The BEST Episodes of Generator Rex

Every episode ever - ranked by fan votes!

Last Updated: Dec 4, 2021

Network: Cartoon Network

Five years prior to the start of the series, a massive explosion released nanites into the atmosphere, infecting every living thing on Earth. These nanites randomly activate inside their hosts, mutating the subject into a monster known as an E.V.O. (Exponentially Variegated Organism). These Evos are usually mindless creatures that are a danger to everything around them. To combat the Evo threat, the organization known as Providence was created to capture and cure them. Rex is a 15-year-old amnesiac teenager who, like everyone else, has been infected with nanites. However, unlike most Evos, Rex can control his nanites, allowing him to manifest a variety of powers and even cure other Evos of their mutations. Working with Providence under Agent Six, he helps stop the Evos as they appear. Working against Providence is Van Kleiss, an Evo with connections that are not only to the event which released the nanites, but to Rex as well.

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Promises, Promises

#1 - Promises, Promises

Season 1 - Episode 19 - Aired Nov 19, 2010

It's Rex's birthday (more accurately the anniversary of when he first joined Providence) and Six has flashbacks about how Rex first joined Providence. Back when Providence was forming, captured E.V.O.s were detained only until they were disassembled on a molecular level for study. However, Dr. Holiday, an assistant at the time, believes that studying how nanites cause mutations may one day allow for an option other than kill or contain: cure. One day, Six and his partner White Knight were called to Mexico to deal with a rampaging bio-mechanical E.V.O. only for the E.V.O. to collapse after being battered enough and revealed to be fourteen-year-old Rex. Rex cures a second E.V.O. right in front of Six's eyes and he brings him back to Dr. Holiday to be studied. Despite Rex being her all and more of her wildest dreams rolled into one, Six insists that they keep him under wraps for now. However, White Knight finds Rex and brings him to the head of E.V.O. Studies, Dr. Fell, in hopes that disassembling him will reveal how his curing powers work and how to cure the entire planet all in one shot. However, Six believes that it is too big of a risk to sacrifice what they know will work for something that might work. With assistance from Bobo, a recently captured E.V.O. who was holding the Kremlin hostage for caviar before his capture, Dr. Holiday is able to save Rex. However, White Knight and Six's fight had caused the E.V.O. disassembly machine to overload and destroy all the nanites in White Knight's body, but Rex is able to save White Knight's life by turning off the machine with his powers, in the process, bleaching White Knights skin and hair. Rex's curing abilities has given Providence much needed funding and White Knight is made head of Providence for his zero nanite count. Back in the present, Six gives Rex a Tantō inscribed with the symbol of loyalty for his birthday and states that he has its twin (which was given to him for his birthday the day he found Rex) and sta

star 11.00
296 votes
Directors: Sam Montes
Writers:
Endgame (1)

#2 - Endgame (1)

Season 3 - Episode 19 - Aired Mar 8, 2012

Black Knight attacks the Providence Defect Team and takes a Master Control Nanite out of Rex, allowing her to use Rex's powers.

star 10.78
612 votes
Directors: John Fang
Writers: Rob Hoegee
Lions and Lambs

#3 - Lions and Lambs

Season 2 - Episode 19 - Aired Nov 4, 2011

Van Kleiss has found a way to enhance Breach's powers so she can now open portals in time. To stop this dangerous threat, Rex must attempt to lure her over to the good side.

star 10.62
514 votes
Directors: Seung-Hyun Oh
Writers: Rob Hoegee
A Brief History of Time

#4 - A Brief History of Time

Season 3 - Episode 13 - Aired Feb 10, 2012

Van Kleiss' travels through time are recounted as he returns to the present with something on his tail.

star 10.52
563 votes
Directors: Chris Graham
Writers: Paul Giacoppo
Assault on Abysus

#5 - Assault on Abysus

Season 3 - Episode 11 - Aired Jan 27, 2012

Rex races to Abysus in hopes of beating the Black Knight and Providence there.

star 10.50
388 votes
Directors: Seung-Hyun Oh
Writers: James Felder
Target: Consortium

#6 - Target: Consortium

Season 3 - Episode 16 - Aired Feb 24, 2012

The Jungle Cat E.V.O. returns and helps Rex and Agent Six attempt to find and take out Black Knight's bosses in the Consortium.

star 10.47
532 votes
Directors: Chris Graham
Writers: Alexx Van Dyne
Divide by Six

#7 - Divide by Six

Season 2 - Episode 6 - Aired Mar 18, 2011

Six asks for Rex's help to cure his old mentor, who's become an E.V.O.

star 10.45
176 votes
Directors: Rick Morales
Writers: Rob Hoegee
Heroes United (2)

#8 - Heroes United (2)

Season 3 - Episode 4 - Aired Nov 25, 2011

A one hour crossover episode between Ben 10: Ultimate Alien and Generator Rex in which Ben Tennyson accidentally travels to Rex Salazar's dimension. After quarrels with each other, the two finally work together to stop a threat once created by Rex's brother, Caesar, the Alpha Nanite (Michael Emerson).

star 10.26
565 votes
Writers: Man of Action
Enemies Mine

#9 - Enemies Mine

Season 3 - Episode 17 - Aired Mar 2, 2012

Hunter Cain, Gatlocke, No Face, and Valve team up to take down Rex.

star 10.25
415 votes
Directors: Kenji Ono
Writers: Eugene Son
Endgame (2)

#10 - Endgame (2)

Season 3 - Episode 20 - Aired Mar 15, 2012

Rex must risk losing his memory and resort to his last line of defense to defeat the Consortium. But will it be enough?

star 10.22
532 votes
Directors: Chris Graham
Writers: Rob Hoegee
Hermanos

#11 - Hermanos

Season 3 - Episode 15 - Aired Feb 17, 2012

Rex inherits a farm in South America and invites his friends to explore it with him.

star 10.16
480 votes
Black and White

#12 - Black and White

Season 3 - Episode 9 - Aired Jan 13, 2012

After hearing rumors about what Black Knight is really up to within Providence HQ; Rex, Six, Holiday and White Knight break in to try and confirm the rumor. If true, the Planet could once again come under threat. Caesar reveals a secret about the original outbreak.

star 10.14
335 votes
Directors: Chris Graham
Writers: Man of Action
A Family Holiday

#13 - A Family Holiday

Season 2 - Episode 15 - Aired Sep 30, 2011

Doctor Holiday goes to disastrous lengths to get her younger sister, Beverly, cured by a mysterious man named Dr. Brandon Moses, who says that he has found a cure for incurable E.V.O.s. However, there may be more to his "cure" than meets the eye.

star 10.13
282 votes
Writers: Rob Hoegee
Haunted

#14 - Haunted

Season 2 - Episode 9 - Aired Apr 8, 2011

A ghostly cat-like E.V.O. interrupts Rex and Noah's double-date with Claire and Annie at a haunted hotel.

star 10.13
287 votes
Directors: Rick Morales
Writers: Rob Hoegee
Back in Black

#15 - Back in Black

Season 3 - Episode 1 - Aired Nov 10, 2011

Six months into the future, Rex learns that Black Knight became the head of Providence after White Knight went against the orders of his superiors the Directorate. During this time-skip, Providence has adopted a new method of dealing with captured E.V.O.S. Instead of researching the incurable creatures, they now use a machine to brainwash them into servitude.

star 10.12
243 votes
Writers: Paul Giacoppo
Written in Sand

#16 - Written in Sand

Season 2 - Episode 12 - Aired Apr 29, 2011

While investigating a nanite-free sandstorm, both Rex and Van Kleiss become trapped underground, with their nanites slowly being destroyed. The two enemies must work together in order to survive.

star 10.11
295 votes
Directors: Chris Graham
Writers: Rob Hoegee
Remote Control

#17 - Remote Control

Season 3 - Episode 12 - Aired Feb 3, 2012

Quarry uses Providence collars to control EVOs.

star 10.11
219 votes
Mixed Signals

#18 - Mixed Signals

Season 2 - Episode 7 - Aired Mar 25, 2011

Rex is kidnapped from Providence by a man who claims to be his older brother, Cesar Salazar.

star 10.10
147 votes
Directors: Chris Graham
Writers: Rob Hoegee
Alliance

#19 - Alliance

Season 2 - Episode 4 - Aired Mar 4, 2011

Rex and Bobo are sent to fix a failing shield around the Bug Jar. Unfortunately, Van Kleiss and the Pack, along with Circe, arrive in order to forge an alliance with the inhabitants of the Bug Jar and their vengeful leader, NoFace.

star 10.09
237 votes
Directors: Chris Graham
Writers: Paul Giacoppo
Hard Target

#20 - Hard Target

Season 2 - Episode 14 - Aired Sep 23, 2011

While delivering Chinese food to Providence, Rex is attacked by Breach. She later tells Rex that Van Kleiss has a very important mission for her involving an old friend of Rex's. After she suddenly leaves through a portal to Hong Kong, Rex follows her, mistakenly thinking that Breach is after Circe. Rex eventually discovers that Breach is after his old boss: Quarry.

star 10.07
165 votes
Directors: Seung-Hyun Oh
Writers: Paul Giacoppo
Mind Games

#21 - Mind Games

Season 3 - Episode 14 - Aired Feb 17, 2012

Circe behaves strangely after joining Rex and the gang at the Plant.

star 10.06
236 votes
Heroes United (1)

#22 - Heroes United (1)

Season 3 - Episode 3 - Aired Nov 25, 2011

A one hour crossover episode between Ben 10: Ultimate Alien and Generator Rex in which Ben Tennyson accidentally travels to Rex Salazar's dimension. After quarrels with each other, the two finally work together to stop a threat once created by Rex's brother, Caesar, the Alpha Nanite (Michael Emerson).

star 10.01
404 votes
Writers: Man of Action
Riddle of the Sphinx

#23 - Riddle of the Sphinx

Season 3 - Episode 6 - Aired Dec 16, 2011

The gang go to Egypt, where strange EVO activity surfaces.

star 10.01
336 votes
Directors: Seung-Hyun Oh
Writers: James Felder
Six Minus Six

#24 - Six Minus Six

Season 2 - Episode 18 - Aired Oct 21, 2011

An effort to restore Rex's memories results in Six losing most of his. Now having reverted to his earlier, less-refined self, Rex has to help Six find his way back from heartless mercenary to the mentor he has come to know.

star 10.00
236 votes
Directors: Chris Graham
Writers: Alexx Van Dyne
Guy vs. Guy

#25 - Guy vs. Guy

Season 3 - Episode 8 - Aired Jan 6, 2012

Rex plans a prank on Noah and ropes Bobo into his scheming.

star 9.99
147 votes
Directors: Seung-Hyun Oh
Writers: Jake Black