The BEST Episodes of Generator Rex
Every episode ever - ranked by fan votes!
Last Updated: Sep 18, 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.
#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
11.04 
#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.
10.69 
#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.
10.50 
#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.
10.40 
#5 - 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.
10.36 
#6 - 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.
10.35 
#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.
10.27 
#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).
10.19 
#9 - 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.
10.19 
#10 - Enemies Mine
Season 3 - Episode 17 - Aired Mar 2, 2012
Hunter Cain, Gatlocke, No Face, and Valve team up to take down Rex.
10.15 
#11 - 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?
10.13 
#12 - Remote Control
Season 3 - Episode 12 - Aired Feb 3, 2012
Quarry uses Providence collars to control EVOs.
10.13 
#13 - 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.
10.08 
#14 - 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.
10.08 
#15 - 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.
10.05 
#16 - 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.
10.03 
#17 - Mind Games
Season 3 - Episode 14 - Aired Feb 17, 2012
Circe behaves strangely after joining Rex and the gang at the Plant.
10.01 
#18 - 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.
10.00 
#19 - 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.
10.00 
#20 - 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.
9.99 
#21 - 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.
9.99 
#22 - 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.
9.96 
#23 - Exposed
Season 2 - Episode 16 - Aired Oct 7, 2011
A news crew is given an all-access pass to Providence, and Rex goes a little too far in an effort to get more camera time.
9.96 
#24 - Riddle of the Sphinx
Season 3 - Episode 6 - Aired Dec 16, 2011
The gang go to Egypt, where strange EVO activity surfaces.
9.95 
#25 - 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).
9.94