Generator Rex is an American animated science fiction television series created by Man of Action for Cartoon Network,[1] with John Fang of Cartoon Network Studios as supervising director. It was inspired by the comic M. Rex, created by Aaron Sowd, Joe Kelly and Duncan Rouleau, and published by Image Comics in 1999. The series premiered in the United States on April 23, 2010, on Cartoon Network, and concluded on January 3, 2013, with a total of 60 episodes, plus two episodes remained unaired.

Generator Rex
Created byMan of Action
Based on
Developed byRob Hoegee
Directed by
  • Christofer Graham
  • Rick Morales
  • Seung-Hyun Oh
  • Samuel Montes
  • Kenji Ono
  • John Fang
  • Collette Sunderman (recording director)
Voices of
Theme music composerKevin Manthei
Opening theme"Revolution" by Orange
ComposerKevin Manthei
Country of originUnited States
Original languageEnglish
No. of seasons3
No. of episodes60 (2 unaired) (list of episodes)
Executive producers
  • For Cartoon Network Studios: Brian A. Miller
  • Jennifer Pelphrey
  • For Cartoon Network: Tramm Wigzell
  • Rob Swartz (seasons 1–2)
  • Rob Sorcher
ProducerRyan Slater
Running time
  • 22 minutes
Production companyCartoon Network Studios
Original release
NetworkCartoon Network
ReleaseApril 23, 2010 (2010-04-23) –
January 3, 2013 (2013-01-03)

A two-part crossover special with Ben 10: Ultimate Alien, titled Ben 10/Generator Rex: Heroes United, aired on November 25, 2011, while a second 44-minute four-part special, Ben Gen 10, aired on April 11, 2021, featuring different and younger versions of the Generator Rex characters in the Ben 10 universe.



Seasons 1–2 (2010–2011)


Five years prior to the events of the series, an explosion occurred on Earth, causing microscopic machines called "nanites" to infiltrate the bodies of all its organic life. When activated, nanites mutate the biology of their hosts; living beings with activated nanites are known as Exponentially Variegated Organisms (E.V.O.). Rex is an amnesiac fifteen-year-old boy and permanent E.V.O. who, unlike most other E.V.O.s, lacks physical deformation but has forgotten his past. He is also able to control his active nanites, allowing him to manifest from his body various bio-mechanical abilities and powers. He also has the unique ability to deactivate nanites inside other E.V.O.s, effectively curing them of their mutations and returning them to normal. Working for Providence under Agent Six and White Knight, Rex uses his unique abilities to stop and cure rampant E.V.O.s.

His archenemy, Van Kleiss, is a British scientist who became an earth-manipulating humanoid E.V.O.. He despises Providence and is connected to the original nanite explosion, which is noted as "the Nanite Event" five years prior. He seeks to become all-powerful by using fellow E.V.O.s, and promises to tell Rex about his childhood past if he will join him, using the former's blooming relationship with the siren-like human E.V.O. Circe to do so. Upon attaining Rex's nanites, Van Kleiss acquires the opposing ability to create E.V.O.s upon physical contact; whereas Rex fully regains his powers and access to new and greater machinery from his Omega-1 Nanite after fully tapping into the further evolved nanite's greater technological abilities.

After her second and final mission with the Pack, Circe defects when Van Kleiss threatens Rex's life and joins his E.V.O. street gang in Hong Kong, China. To further complicate matters, Rex's long-lost elder brother Dr. Cesar Salazar suddenly resurfaces and joins Providence. At one point, Van Kleiss and Rex are forced to work together to escape the artificial intelligence Zag-RS, who is revealed to be a creation of Caesar's who modeled her voice after their late Mexican mother Violetta. Back in Hong Kong, Rex encounters and defeats his former boss Quarry, who was given a proposition from Van Kleiss, but was taken to Abysus for punishment after double-crossing him. Rex's ninja-like partner Six suffers amnesia from a machine of Cesar's invention, but chooses not to regain his memories. In a last-ditch effort to achieve his ultimate goal of becoming a god, Van Kleiss further develops Breach's portal-creating ability, allowing her to travel through time. As a result of her abilities, Rex is sent six months into the future and Van Kleiss is sent to the ancient past. In the future, it is revealed that everything has changed drastically since Rex's "disappearance", and he is shocked to meet a woman in charge of Providence who calls herself the "Black Knight."

Season 3 (2011–2013)


Rex is sent six months into the future by Breach's abilities, where everything has changed since his "six-month disappearance" and Providence has been taken over by a woman called the Black Knight. She attempts to manipulate Rex into utilizing his abilities to aid her in "saving" humanity by restarting the Nanite Project with those who had funded it six years ago to become all-powerful by ensuring the creation of five nanites called the Meta Nanites, which contain the "God Code." The first four were scattered across the planet due to the Nanite Event, and the fifth and most powerful one has been kept hidden within Rex himself. Cesar and their late Hispanic scientist parents, Rafael and Violetta Salazar, had secretly programmed them to fully work for him alone.

Upon merging with the God Code, Rex utilizes his newly attained godhood to successfully cure all E.V.O.s. Afterwards, he is reunited with his now-normal friends- Tuck, Cricket and Sqywdd- and girlfriend Circe, and forgives Cesar for his past actions. Van Kleiss, who is revealed to have been responsible for Rafael and Violetta's deaths by trapping them inside as the nanite reactor exploded, is taken to Breach's pocket dimension of Greenville, Ohio.



Main characters

  • Daryl Sabara as Rex Salazar, Rombauer (1st time), White Fighter, East Side kid
  • Wally Kurth as Agent Six, Captain Calan, Maxwell, Systems Op
  • John DiMaggio as Bobo Haha, Skalamander, Architect, Jungle Cat, Pete Volkov, Robo Bobo Haha, Michael, Hunter Cain (2nd time), Dark figure, Rath, Providence Agent (1st time), Huckster, Vostok, Pyreptryx, Nyquist, Biruta, Umpire, Infected 2, Human EVO, Lunk, Waiter (1st time), Payson, Bug, DJ, Older Providence worker, Dock Worker, Guard 1, Providence Tech (2nd time), Villager, Providence Soldier 1 (2nd time), Black Pawn
  • Grey DeLisle as Rebecca Holiday, ZAG-RS, Little Girl (Slug EVO), Woman (Rock & Mud EVO), Female Co-pilot, Doctor Rhodes, Diane Farrah, Isabella, Violeta Salazar, Little Spanish boy, Reporter, Kate, Larvus, Wade, Waitress, House wife, Trig Student 2, Beach Girl 1, Echoey Voice 2, Computer, Innocent girl, News Reporter, Librarian, Lady
  • J.K. Simmons as White Knight, Cured E.V.O., Waiter (2nd time), Control Voice
  • Fred Savage as Noah Nixon, Beagle (1st time), Waylan, Infected 1, Sit-Ops Tech, Team leader
  • Troy Baker as Van Kleiss, Biowulf, Agent Weaver, Roswell, Captured zombie, Businessman, Etude, Echoey Voice 1, United Nations Official, Providence Tech (2nd time), Guard, Male Party-Goer, Providence Soldier 1 (1st time)

Recurring characters




Generator Rex currently does not air on Cartoon Network. Episodes 56 through 60 were released on iTunes for purchase before they aired. The show "ended" with its third season, but had left out many important things unresolved before the two-part season three finale "Endgame"; namely Rex and Circe's romantic relationship that finally blossomed at the end of Episode 51 "Assault on Abysus" and with Rex rescuing her from Providence ("Mind Games") some time before the two-part finale.

SeasonEpisodesOriginally aired
First airedLast aired
121April 23, 2010 (2010-04-23)December 10, 2010 (2010-12-10)
219February 4, 2011 (2011-02-04)November 4, 2011 (2011-11-04)
320 (2 unaired)November 11, 2011 (2011-11-11)January 3, 2013 (2013-01-03)
Ben Gen 10April 10, 2021 (2021-04-10)[2][3]



On July 11, 2011, the schedule for the 2011 San Diego Comic-Con revealed that during Cartoon Network's panel, a crossover special between the Ben 10: Ultimate Alien and Generator Rex series titled Ben 10/Generator Rex: Heroes United would be discussed. During the conference, show creators "Man of Action" revealed that the crossover would be a special, extended episode of Generator Rex, which aired on November 25, 2011, on Cartoon Network.[4][5] The double-length special[6] revolved around Ben and Rex fighting a villain, originally created by Rex's older brother Caesar, the Alpha Nanite.[7] Rex makes a cameo appearance in the OK K.O.! Let's Be Heroes episode, Crossover Nexus along with many other Cartoon Network shows. On February 17, 2021, it was announced Generator Rex would have a 44-minute crossover special with Ben 10, which aired on April 11, 2021.[8]

Other media


Home video


Warner Home Video released Volume 1 DVD, a two-disc set that contains the first nine episodes of the series on October 19, 2010.[9]

Video game


A video game, entitled Generator Rex: Agent of Providence, has been developed for Wii, PlayStation 3, Nintendo DS, Nintendo 3DS and Xbox 360. The game was released on November 1, 2011, in the United States, developed by Virtuos and published by Activision.[10][11] The plot involves Van Kleiss attempting to find blueprints to build an Omega-One Nanite. The entire voice cast reprises their roles from the series.[citation needed] Agent of Providence was given an E10+ rating by ESRB.[12] The game was also scored by the series' composer, Kevin Manthei.[13]

Toy line


Mattel has produced a toy line based on the series. For the main figures each is approximately 4 inches tall and packaged with an ordinary day E.V.O. There were also deluxe figures, EVO attack packs, as well as other waves and lines that were never released including a line from MEGA Bloks was announced (in 2010) featuring construction sets.[14]



Cartoon Network has featured Generator Rex and Ben 10 in their and DC Comics's Cartoon Network: Action Pack comic books.[15] Two 3D picture books (featuring cardboard 3D glasses) "EVOs and Heroes," a whole analysis on characters and their abilities and "The Swarm," an adaption of the episode of the same name, where Rex must fight insect E.V.O.s that feed on metal, have also been released.[15] For beginning readers, the story "Leader of the Pack" is also based on an episode and features Rex and Bobo being captured and locked in an underground prison cell.[15]

In February 2013, IDW Publishing announced a partnership with Cartoon Network to produce comic books and issues based on its properties. Generator Rex along with Ben 10 was one of the titles announced to be published.[16]


Year Award Category Recipients and nominees Result
2010 62nd Primetime Emmy Awards Outstanding Individual in Animation Chu-Hui Song and Nora Murphy-Breden
for the episode "The Day That Changed Everything"

See also



  1. ^ Perlmutter, David (2018). The Encyclopedia of American Animated Television Shows. Rowman & Littlefield. p. 236. ISBN 978-1538103739.
  2. ^ NickandMore! (March 22, 2021). "Cartoon Network Announces Spring Break Programming Event". Retrieved March 22, 2021.
  3. ^ Milligan, Mercedes (March 22, 2021). "Cartoon Network Plans 2-Week 'Spring Breakaway' with Premieres, Movies & More". Animation Magazine. Retrieved March 22, 2021. Headlining the virtual spring break bash is a three-day debut for the previously announced Ben 10 specials
  4. ^ SDCC2011: Generator Rex/Ben 10 Crossover Special Set For Thanksgiving Archived September 15, 2012, at
  5. ^ Ben 10 and Generator Rex News from Comic-Con - YouTube
  6. ^ CN to Air 'Ben 10/Generator Rex' Crossover Episode'
  7. ^ "Ben 10 & Generator Rex Unite, The Season Finale Of Thundercats, And Ahsoka Returns To Clone Wars!". Archived from the original on December 30, 2011. Retrieved December 4, 2011.
  8. ^ "WarnerMedia Upfronts: Cartoon Network, HBO Max 'Redraw Your World' with More Kids Content". February 17, 2021.
  9. ^ "CARTOON NETWORK: GENERATOR REX VOLUME 1". Archived from the original on January 26, 2012. Retrieved November 13, 2011.
  10. ^ Generator Rex: Agent of Providence
  11. ^ Generator Rex Video Game Coming This Fall
  12. ^ Activision's High-octane Action Adventure Generator Rex: Agent of Providence Available Now
  13. ^ "5.11 - Generator Rex - Agent of Providence Game!". Archived from the original on May 17, 2014. Retrieved December 7, 2011.
  14. ^ Turner generates licensing momentum for Rex
  15. ^ a b c Watch and Read: Super Teen Machine: Cartoon Network's 'Generator Rex'
  16. ^ "IDW Teams up with Cartoon Network!". Archived from the original on February 28, 2013. Retrieved May 18, 2013.