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C-57D

The United Planets Cruiser C-57D is a fictional starship central to the 1956 Metro-Goldwyn-Mayer science fiction film Forbidden Planet, designed as a faster-than-light spacecraft for deep-space exploration and missions in the 23rd century (circa 2200).^[1] In the film's narrative, the C-57D is dispatched from Earth under the command of John J. Adams (played by Leslie Nielsen) to the distant planet Altair IV, the fourth world orbiting the star Altair in the constellation Aquila, approximately 16.7 light-years away, to investigate the fate of the Bellerophon expedition that vanished there two decades earlier.^[1]^[2] The all-male crew of 18, averaging 24.6 years old, includes key members such as Lieutenant "Doc" Ostrow (Warren Stevens), Lieutenant Farman (Jack Kelly), and Chief Quinn (Richard Anderson), who face mysterious threats including an invisible, destructive force upon landing.^[1] The vessel's design resembles a classic flying saucer, featuring two large disc-shaped sections connected by a central spine, with landing struts and no visible propulsion elements on the exterior, emphasizing its role as a self-contained exploratory craft equipped with atomic-powered weapons and a protective energy fence.^[2] Produced on a budget of $1–2 million under director Fred M. Wilcox, the C-57D's physical model was constructed at MGM studios and later reused in other productions.^[1] The starship's interior sets showcased advanced (for the era) technology, including control rooms with electronic interfaces and crew quarters.^[3] The C-57D has endured as an iconic element of mid-20th-century science fiction cinema, influencing later depictions of spacecraft in films and television, such as those in Star Trek, due to its portrayal of disciplined military protocol in space amid existential threats. In November 2024, Warner Bros. announced a remake of Forbidden Planet with a script by Brian K. Vaughan.^[4]^[5]

Fictional Background

Design and Specifications

The United Planets Cruiser C-57D features a classic saucer-shaped design, consisting of a large circular hull with upper and lower domes, evoking the flying saucers popularized in mid-20th-century science fiction. Its exterior is portrayed with a smooth, metallic finish in silver tones, accented by subtle panel lines and ports, while three retractable landing struts enable planetary touchdowns. The hero filming miniature, constructed primarily from wood and metal, measured approximately 82 inches (208 cm) in diameter to facilitate detailed optical effects sequences.^[6] In the film's fictional universe, the C-57D operates as a cruiser-class exploratory vessel equipped for long-range interstellar missions. Propulsion relies on a hyperdrive system for faster-than-light travel through hyperspace, allowing rapid transit across vast distances such as the journey to Altair IV. The ship supports a crew of 18 personnel, comprising officers, scientists, and engineers, with facilities for extended voyages including life support and deceleration stasis tubes to mitigate high-speed effects. Advanced sensor arrays, including scanners for surface analysis, facilitate planetary surveys and threat detection during approach and orbit.^[7]^[8] The interior layout, as depicted in key scenes, centers on functional, utilitarian spaces tailored to a military-scientific crew. The command bridge houses navigational controls, communication stations, and a viewscreen for monitoring hyperspace entry and planetary data. Adjoining areas include crew quarters with bunk arrangements, a sickbay for medical procedures, and a central corridor leading to an engine room showcasing the hyperdrive core. Additional compartments serve as briefing rooms and storage holds. These elements are derived from on-set constructions and implied in production visuals, emphasizing efficient, modular design for a compact saucer form.^[9] The C-57D's aesthetic draws inspiration from 1950s aviation trends and early space age concepts, particularly the disc-shaped aircraft prototypes and widespread UFO reports that fueled public imagination during the era. Designers incorporated sleek, aerodynamic contours reminiscent of experimental flying discs like the Avrocar project, blending optimism for atomic-powered flight with speculative extraterrestrial motifs to create a visually iconic spacecraft.^[10]

Role in the Narrative

In the 23rd century, the United Planets Cruiser C-57D embarks on a critical rescue mission to Altair IV, dispatched to investigate the disappearance of the Bellerophon expedition twenty years prior, which had been sent to explore the distant planet.^[11] Under the command of J.J. Adams, the ship's 18-man crew—the all-male group averaging 24.6 years old—travels over 378 days across 16.7 light-years, arriving to find only Dr. Edward Morbius and his daughter Altaira surviving from the original team, along with the advanced robot Robby.^[9]^[7] The C-57D's arrival sets the narrative in motion, with Adams ignoring Morbius's radio warnings against landing and securing coordinates for a touchdown on the barren world's surface, where the green-tinged sky and breathable atmosphere belie hidden dangers.^[11] Upon landing, the C-57D establishes itself as the crew's fortified base, from which they conduct investigations into the planet's mysteries and the fate of the lost expedition. Key scenes unfold aboard the ship, including tense bridge discussions led by Adams, where he coordinates with officers like Lieutenant "Doc" Ostrow and Lieutenant Jerry Farman to analyze threats and maintain order amid growing unease.^[11] The vessel becomes a focal point of peril during nocturnal attacks by an invisible "monster from the Id," a psychic manifestation powered by the ancient Krell civilization's technology, which assaults the grounded cruiser and forces the crew to defend it with blasters and disintegrator beams, as well as force fields.^[9]^[7] These encounters heighten crew dynamics, showcasing Adams's decisive leadership as he rallies the team against the unseen foe while grappling with revelations about subconscious human impulses. Symbolically, the C-57D embodies humanity's exploratory zeal and technological optimism, representing a military-style push into the cosmic frontier much like historical voyages of discovery, yet it underscores the theme of hubris by contrasting the ship's human-engineered capabilities—such as its faster-than-light drive—with the Krell's far superior, mind-activated machinery that ultimately led to their extinction.^[9] This juxtaposition highlights the perils of unchecked ambition, as the crew's overconfidence in confronting Altair IV's secrets mirrors the Bellerophon's doomed venture, named after the mythological figure punished for arrogance.^[12] Through its role, the C-57D drives the plot toward a climactic escape, as Adams and survivors flee the planet's self-destruction, carrying warnings about the destructive potential within advanced knowledge.^[9]

Production History

Model Construction

The hero miniature of the United Planets Cruiser C-57D, an 82-inch diameter flying saucer prop central to the visual storytelling in Forbidden Planet, was constructed by Metro-Goldwyn-Mayer's (MGM) special effects department during the film's production from 1955 to 1956. Led by supervisors A. Arnold Gillespie and Irving G. Ries, the team crafted the model using a combination of wood for the structural frame, steel reinforcements for stability, and fiberglass for the outer skin to create a sleek, metallic appearance. This material selection allowed the prop to balance weight considerations essential for dynamic filming sequences while maintaining rigidity under studio conditions. The craftsmanship emphasized precision in scaling and detailing, including the characteristic dome and landing gear mechanisms, to ensure seamless integration with matte paintings and other effects elements. To support varied shot requirements, MGM's effects team also produced smaller-scale versions of the C-57D miniature, such as approximately 24-inch models, for close-up and insert shots that demanded finer manipulation. These auxiliary props followed similar construction principles but incorporated lighter components to facilitate easier handling and positioning on set. The overall build process reflected the era's innovative approach to science fiction props, prioritizing functionality for suspension rigs and rotational movements without compromising the model's aesthetic fidelity to the fictional design. The original hero prop endured beyond production, surviving MGM's 1970 asset liquidation auction where it was acquired for $800 by a private buyer in North Carolina. Stored in a garage for nearly four decades, it resurfaced in 2008 when offered at Profiles in History's Hollywood Auction, fetching $78,000 and entering a private collection thereafter. This preservation highlights the prop's enduring cultural value, as one of the few intact artifacts from the film's groundbreaking effects work.

Visual Effects Techniques

The visual effects depicting the C-57D in Forbidden Planet were overseen by MGM's special effects supervisor A. Arnold Gillespie, with optical effects handled by Irving G. Ries and matte painting supervision by Warren Newcombe.^[13] These techniques marked a significant advancement for mid-1950s science fiction cinema, blending physical models with optical processes to create convincing interstellar travel and planetary environments entirely on soundstages.^[14] Matte paintings played a central role in portraying the C-57D's approach to Altair IV and its landing, extending practical sets to evoke an otherworldly planet. Artists Howard Fisher, Henri Hillinck, and Matthew Yuricich produced detailed paintings of Altair IV's rugged, barren surface under a perpetual green sky, which were photographed and optically composited with miniature footage of the ship by Ries' team.^[15]^[14] This compositing process involved multiple passes through MGM's optical printer, layering the saucer model against the painted backdrops to simulate descent through the atmosphere, with careful attention to lighting and motion blur for depth.^[13] Flight sequences featuring the C-57D in motion relied on suspension rigs to hold the 82-inch-diameter model steady while cameras captured smooth arcs, augmented by rotating mechanisms for rotational saucer maneuvers.^[15] Animators Dwight Carlisle and Joe Alves then added hand-drawn elements in post-production, including pulsating glows from the ship's ventral engines and trailing exhaust effects, achieved through cel overlay and optical printing to mimic faster-than-light propulsion without relying on rudimentary pyrotechnics.^[15] Integration of these elements with live-action footage emphasized seamless realism, using split-screen and optical compositing to position the ship model against actor performances and practical landscapes. Forced perspective was employed during compositing to exaggerate the C-57D's massive scale—comparable to a small city—against Altair IV's terrain, with foreground miniatures and rear-projected mattes aligning lines of sight for dramatic arrivals and departures.^[13]^[15] The production's pioneering application of traveling mattes, particularly for dynamic ship movements over static painted horizons, allowed for fluid motion without physical set extensions, earning an Academy Award nomination for Best Special Effects.^[16] These methods influenced later sci-fi visuals, notably Stanley Kubrick's avoidance and refinement of similar matte and compositing workflows in 2001: A Space Odyssey to achieve even greater photorealism.^[17]

Media Appearances

In Forbidden Planet

The C-57D makes its first appearance in the film's opening sequence, where a dramatic narration overlays footage of the saucer-shaped cruiser emerging from hyperspace on its voyage to Altair IV, establishing the scale of interstellar travel in the 23rd century.^[18] This voyage sequence, accompanied by soaring orchestral music, visually conveys the ship's majestic isolation amid the vastness of space, setting a tone of human ambition venturing into the unknown. Later, a pivotal landing sequence depicts the C-57D descending toward the barren surface of Altair IV, with its landing struts extending in a precise, mechanical deployment that highlights the vessel's engineering prowess against the stark alien terrain.^[9] Interior bridge scenes further showcase the ship's operational heart, particularly during crises such as the invisible monster's attack, where crew members monitor radar screens and coordinate defenses in a compact, utilitarian command center filled with blinking consoles and analog instruments.^[19] These moments emphasize the crew's reliance on the C-57D as both sanctuary and tool, with the camera lingering on the officers' tense interactions amid the hum of machinery. Visually, the saucer's gleaming metallic surface contrasts sharply with the desolate, reddish landscape of Altair IV, a motif that underscores themes of technological advancement and profound isolation, as the ship's pristine form symbolizes humanity's fragile foothold in an unforgiving cosmos.^[20] The film's on-screen depictions distinguish between hero shots, utilizing the full-scale 82-inch diameter model for detailed, static close-ups that capture the ship's riveted hull and landing gear intricacies, and process shots employing smaller miniatures—approximately 50 cm and 110 cm in height—for dynamic sequences like planetary approaches, where projected backgrounds integrate the vessel into expansive environments.^[21]^[20] This approach allows the C-57D to appear monumental in landing scenes while fluidly navigating space vistas, enhancing the cinematic immersion without revealing scale inconsistencies. The ship's design, evoking a flying saucer amid 1950s UFO fascination, bolsters the film's adaptation of Shakespeare's The Tempest, where the C-57D parallels the enchanted island's arrival of outsiders, amplifying motifs of exploratory hubris and the perils of confronting the subconscious "id" on a forbidden world.^[22] By visually positioning the cruiser as a beacon of ordered civilization amid chaotic alien forces, it reinforces the narrative's exploration of human potential and the dangers lurking in uncharted realms.^[9]

In The Twilight Zone

The United Planets Cruiser C-57D from Forbidden Planet appeared in stock footage within episodes of The Twilight Zone, a CBS anthology series created by Rod Serling, through licensing arrangements that allowed the production to access MGM's library of visual effects assets.^[23] This reuse exemplified cost-effective production practices in 1960s television, where high-quality miniature models from major films were repurposed to depict spacecraft in science fiction narratives.^[24] The C-57D footage was used in the season 1 episode "The Monsters Are Due on Maple Street," broadcast on April 1, 1960, where a brief clip of the saucer landing served as a UFO visual to incite suburban paranoia about an impending alien threat.^[24] These appearances underscored the model's versatility in evoking mid-20th-century fears of unidentified flying objects, with the footage briefly flashing across the screen to represent the unseen invaders manipulating human society. Production notes indicate that MGM's cooperation with CBS facilitated such borrowings, as the studio maintained the original miniatures on its lot for potential reuse in television projects.^[23] In the season 3 episode "To Serve Man," which aired on March 2, 1962, the landing ramp from the C-57D model was used for the Kanamit alien ship's exterior in the episode's climax, visualizing the extraterrestrials' arrival and enhancing the tension of humanity's unwitting surrender to seemingly benevolent visitors.^[25] The model also appeared extensively in other episodes, including "Third from the Sun" (season 1, episode 14, aired January 29, 1960), featuring the starship and its navigation center, and "Death Ship" (season 4, episode 17, aired February 15, 1963), where stock and new footage of the saucer—renamed the E-89—depicted a crashed spaceship in a time-loop storyline, with newly composed audio effects to fit the ominous tone.^[24]

Cultural Legacy

Model Kits and Replicas

The first commercial model kit of the C-57D starship was produced by Polar Lights in 2001 as a 1:72 scale injection-molded plastic kit, measuring approximately 28 inches in diameter when assembled and including detailed parts for the saucer section, landing gear, and ramps.^[26] This kit captured the iconic flying saucer design from the film, allowing hobbyists to replicate the ship's exterior with basic interior elements like a control center.^[27] Subsequent reissues by Polar Lights, under parent company Round 2 Models, expanded on the original. The 2009 edition featured updated box art, improved decals, and added scale figures of the crew, Altaira, and Robby the Robot for enhanced display options.^[28] In 2013, a smaller 1:144 scale version (12 inches in diameter) was released, emphasizing ease of assembly with posable ramps and compatibility with aftermarket LED lighting kits for simulating engine effects.^[29] Recent 2020s releases and add-ons from Round 2 include deluxe variants with integrated or optional LED systems for illuminated interiors and rotating elements, appealing to advanced builders.^[30] Fan-made replicas have proliferated through modern fabrication techniques, particularly 3D printing. Detailed STL files for the C-57D are freely available on platforms like Thingiverse and Cults3D, enabling custom prints in various scales, often with modular parts for interiors or landing configurations.^[31] Enthusiasts have showcased larger builds, including near full-scale mockups displayed at science fiction conventions, where they serve as interactive exhibits blending craftsmanship with the ship's cultural icon status.^[32] Due to their association with a landmark sci-fi film, these kits hold significant collectible value. Vintage 2001 Polar Lights editions in sealed condition frequently sell for $150 to $300 or more on secondary markets, driven by scarcity, nostalgic appeal, and the ship's enduring influence on genre modeling.^[33] Reissued kits from the 2010s command $100–$200, with lighted deluxe versions exceeding $250 among collectors.^[34]

Tributes and Influences

The saucer-shaped design of the C-57D, drawing directly from the era's widespread UFO sightings, reinforced the flying saucer as a staple aesthetic in science fiction, embedding it deeply into popular culture's visualization of interstellar travel and extraterrestrial encounters.^[35]^[9] This iconic form not only mirrored contemporary public fascination with unidentified flying objects but also set a precedent for human spacecraft depicted as disc-like vessels, influencing perceptions of futuristic technology in media and beyond. The general styling of the C-57D influenced later science fiction productions, including the saucer design of the Jupiter 2 in the 1965 television series Lost in Space.^[14]^[36] The film Forbidden Planet as a whole has had a profound impact on science fiction, including Star Trek: The Original Series.^[14] Tributes to the C-57D appear in later films as direct nods to its legacy. In the 2005 film Serenity, a derelict rescue ship encountered on the planet Miranda bears the designation "C57D," serving as an explicit homage to the United Planets Cruiser from Forbidden Planet.^[37] In academic discourse on science fiction, the C-57D and its integration within Forbidden Planet are celebrated for pioneering practical effects that blended optical miniatures, matte paintings, and innovative sound design to create immersive alien environments. Scholars highlight the film's use of electronic tonalities—generated via theremin and other avant-garde instruments—for the cruiser's engines and Krell machinery as a foundational moment in sci-fi audio-visual techniques, influencing the genre's emphasis on sensory immersion over mere spectacle.^[38] This recognition underscores the C-57D's role in elevating practical effects from gimmickry to a sophisticated tool for exploring human-alien dynamics and technological hubris in popular culture.

References

[1]
Forbidden Planet (1956) - Turner Classic Movies - TCM
In United Planets space cruiser C57D, Commander Adams and his all male crew approach the distant star Altair-4 to search for survivors from the spaceship ...
[2]
[PDF] fictional spaceships travel at the speed of plot. so says j.
From the exterior, the C-57D is an undifferentiated flying saucer, without any visual suggestion of a new propulsion system. Inside, the ship's helmsman sits ...
[3]
[PDF] ScholarWorks@GSU - Georgia State University
Forbidden Planet is a rescue story set in space. The crews of United Planets Cruiser C-. 57D look for the trace of the crews of the spaceship Bellerophon ...
[4]
[PDF] "Forbidden Planet" (1956) as a Veiled Criticism of McCarthyism in ...
The starship known as United Planets Cruiser C-57D arrives at the planet Altair IV in the year 2257. Commander Adams (Leslie Nielsen) of the C-57D leads an ...
[5]
Untitled - Project MUSE - Johns Hopkins University
Forbidden Planet (1956), set in the twenty- third century, tells how a spaceship, the United Planets cruiser C- 57D, travels to Altair IV. (the fourth planet ...
[6]
'Forbidden Planet' saucer lands at auction - Los Angeles Times
Dec 10, 2008 · On Thursday, the iconic flying saucer from the 1956 MGM classic “Forbidden Planet ... The silver saucer is 82 inches in diameter and ...
[7]
Forbidden Planet (1956) Movie Script | SS
United Planets Cruiser C-57D, J.J. Adams commanding. - Who are you? - Morbius of the Belerephon. - Who? - Edward Morbius. Yeah, here it is. Morbius, E. Ph.D ...
[8]
Forbidden Planet (1956) - Greatest Films
Some time in the 23rd century, an all-male crew of about 20 young, uniformed explorers-scientists was on board a United Planets Cruiser C-57D, sent by the ...<|control11|><|separator|>
[9]
Creating Our Own Final Frontier: Forbidden Planet | Centauri Dreams
Sep 11, 2017 · Having just traveled roughly 100 trillion miles across interstellar space, the crew of the C-57D, led by Commander John “J. J.” Adams, naturally ...Missing: specifications | Show results with:specifications
[10]
A Forbidden Planet prop United Planets Cruiser C-57D - Bonhams
Out of stockA Forbidden Planet prop United Planets Cruiser C-57D MGM, 1956. Silver and gray spherical starship with gray dome top and a smaller dome on the underside.<|control11|><|separator|>
[11]
Forbidden Planet - TCM
The film opens with the approach of Cruiser C-57D toward Altira IV, a planet with a strange history. It seems an exploration ship vanished there twenty ...
[12]
CULT MOVIE REVIEW: Forbidden Planet (1956) | John Kenneth Muir
Jun 7, 2011 · As Forbidden Planet commences, space cruiser C-57D under ... Monster from the Id's sustained attack upon the landed cruiser by night.Missing: summary | Show results with:summary<|control11|><|separator|>
[13]
The world's most comprehensive Film database - AFI|Catalog
A 5 Apr 1955 HR noted that Forbidden Planet required over 89,000 square feet of sound stage space, making it one of the largest productions for M-G-M. According ...
[14]
Forbidden Planet: The Moment Hollywood Got Serious About Sci Fi ...
Mar 6, 2024 · The film's matte paintings were done by Howard Fisher, Henri Hillinick, and Matthew Yuricich, and overseen by supervisor Warren Newcombe. Other ...
[15]
Forbidden Planet - Shakespeare in Space - Matte Shot
Mar 10, 2011 · A look back at the effects work from the 1955 FORBIDDEN PLANET which have made that film so endearing to legions of fans the world over.Missing: C- 57D suspension rigs
[16]
10 Movies With Mind-Blowing FX That Pushed The Envelope
Nov 29, 2013 · Forbidden Planet's special effects artists utilized split screen and traveling mattes to make objects disappear and reappear. ... Forbidden Planet ...
[17]
50 years of 2001: A Space Odyssey – 5 films that influenced ... - BFI
Mar 28, 2018 · ... space pictures such as Destination Moon (1950) and Forbidden Planet (1956) with effects and philosophical themes that were a clear jump forward.
[18]
FORBIDDEN PLANET (a film retrospective by Mark R. Leeper)
Forbidden Planet is a space-set, influential 1950s sci-fi film about a rescue mission to Altair IV, where a mysterious force killed most of the crew.
[19]
The Monster Attacks Cruiser C-57D (Remastered to 5K/48fps HD)
Mar 18, 2022 · FORBIDDEN PLANET: The Monster Attacks Cruiser C-57D (Remastered to 5K/48fps HD) · Comments.
[20]
Forbidden Planet (1956) – Visual Imaginations, Concepts and ...
Nov 29, 2021 · The space cruiser C-57D is on a search-and-rescue mission to the 4th planet of the Altair system. Twenty years earlier, the spaceship ...
[21]
FORBIDDEN PLANET ORIGINAL C-57D SPACESHIP
Nov 24, 2023 · Original 82-inch diameter hero "United Planets Cruiser C-57D" flying saucer filming miniature from Forbidden Planet. ( MGM, 1956 )
[22]
Science Fiction, Forbidden Planet, and Shakespeare's The Tempest
The result of Caroti's analysis is to read Prospero and his magic in contemporary terms: the film translates Shakespeare's sense of wonder and the conflict ...
[23]
Forbidden Planet Transformed The Twilight Zone's "Death Ship"
Feb 12, 2025 · The Twilight Zone borrowed Forbidden Planet and MGM props on more than one occasion, including for the Season 4 episode "Death Ship."
[24]
How The Ship From Forbidden Planet Found Its Way Into The ...
Feb 10, 2024 · 1956's "Forbidden Planet" follows a crew of astronauts traveling the galaxy in a flying saucer. ... C-57D) is a simple flying saucer ...
[25]
"Forbidden Planet" C-57D Review by Brett Green (Polar Lights 1/72)
Jun 25, 2001 · I was wrong - this box contained Polar Lights' 1/72 scale C-57D Starcruiser from the classic 1956 science fiction movie, "Forbidden Planet".
[26]
http://www.kitreview.com/reviews/c57dreviewbg_1.htm
[27]
SAUCER SIGHTING: C-57D SPACE CRUISER FROM 'FORBIDDEN ...
Sep 2, 2013 · However, Polar Lights reissued the kit in 2009, this time including a selection of figures. Alternatively, 1:72 scale figures are widely ...
[28]
Polar Lights 1/144 scale Forbidden Planet C-57D space cruiser
Oct 2, 2013 · In keeping with saucer designs of the 1950s, the ship doesn't have a lot of surface detail. But the lines it does have are sharp ...
[29]
Engine Sequencer for 12" C-57D Space Cruiser - TenaControls
TenaControls offers an excellent light system for the 12 inch C57D Space Cruiser from Forbidden Planet. This lighting system is designed for the Round2/Polar ...<|separator|>
[30]
Forbidden Planet's C-57D Ver.3 1/350th by Evildave - Thingiverse
Nov 29, 2020 · For this version I have improved the over all quality and made it easier to print and assemble. It also comes with a stand and diorama-stand.Missing: replicas | Show results with:replicas
[31]
https://www.thingiverse.com/thing:4669764
[32]
Forbidden Planet C-57D Space Cruiser Polar Lights Model Kit - eBay
In stock Free deliveryEmbark on a modeling journey with the Forbidden Planet C-57D Space Cruiser Polar Lights Model Kit, a must-have for enthusiasts of science fiction and space ...
[33]
Polar Lights Forbidden Planet Space Cruiser C-57D Model Kit
In stock Rating 5.0 6 This is one big, heavy, model kit! The box is large at 16” wide, 17” high and 7” deep. This kit has the original factory seal on it and has never been opened.
[34]
The UFO sightings that swept the US - BBC
Jul 14, 2022 · They included Devil Girl from Mars (1954), This Island Earth (1955), Forbidden Planet (1956), Invasion of the Saucer-Men (1957) and The Atomic ...
[35]
Classic Reviews: Forbidden Planet | The Catholic Geeks
Jun 1, 2015 · Joss Whedon gave it the call sign “C57D” as a tribute to Forbidden Planet. SerenityC57D. The design of the ship was inspired by the rash of UFO ...