The BEST Episodes of Generator Rex
Every episode ever - ranked by fan votes!
Last Updated: Jul 26, 2019
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 - Heroes United (2)
Season 3 - Episode 4
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).
9.80 
#2 - Target: Consortium
Season 3 - Episode 16
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.
9.80 
#3 - A Brief History of Time
Season 3 - Episode 13
Van Kleiss' travels through time are recounted as he returns to the present with something on his tail.
9.75 
#4 - Heroes United (1)
Season 3 - Episode 3
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).
9.73 
#5 - Endgame (1)
Season 3 - Episode 19
Black Knight attacks the Providence Defect Team and takes a Master Control Nanite out of Rex, allowing her to use Rex's powers.
9.71 
#6 - Remote Control
Season 3 - Episode 12
Quarry uses Providence collars to control EVOs.
9.50 
#7 - Rock My World
Season 3 - Episode 18
Rex becomes a security guard of a music band called the Trendbenders. He has to protect them from an obsessed fan who was angry at the change in the band.
9.50 
#8 - Endgame (2)
Season 3 - Episode 20
Rex must risk losing his memory and resort to his last line of defense to defeat the Consortium. But will it be enough?
9.22 
#9 - Six Minus Six
Season 2 - Episode 18
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.
9.17 
#10 - Basic
Season 1 - Episode 17
Rex decides to attend "Providence Boot Camp" in an attempt to beat Noah. Once the boys arrive at the camp, they must dissect E.V.O.s, do sit-ups until they puke (literally), and even brush their teeth a specific way. When Rex and Noah fail a crash landing test and are ordered to do it over and over again until they do it correctly, they realize this may not be as easy as they thought. Things take a turn for the worse when a cadet, Kenwyn, who is angry at Rex for dropping her rank from #1, turns off the power restraint collar placed on E.V.O.s agents in training must battle. As a twist, the General sends her down instead of Rex since Rex fought it eariler in the episode. All the E.V.O.s, including Weaver, break loose and wreak havoc until Kenwyn works with Noah and a very helpful extra to distract the E.V.O.s so Rex can beat them. These four graduate from Basic Training and Noah and Rex are seen walking down the Stone Steps, betting money on who will make it to the bottom first.
9.09 
#11 - Promises, Promises
Season 1 - Episode 19
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 states that it is a symbol that they are going down the same path together.
9.00 
#12 - Robo Bobo
Season 2 - Episode 5
Rex discovers that Bobo has replaced himself with a robot duplicate.
9.00 
#13 - Mixed Signals
Season 2 - Episode 7
Rex is kidnapped from Providence by a man who claims to be his older brother, Cesar Salazar.
9.00 
#14 - Guy vs. Guy
Season 3 - Episode 8
Rex plans a prank on Noah and ropes Bobo into his scheming.
9.00 
#15 - Assault on Abysus
Season 3 - Episode 11
Rex races to Abysus in hopes of beating the Black Knight and Providence there.
9.00 
#16 - Mind Games
Season 3 - Episode 14
Circe behaves strangely after joining Rex and the gang at the Plant.
9.00 
#17 - Hermanos
Season 3 - Episode 15
Rex inherits a farm in South America and invites his friends to explore it with him.
9.00 
#18 - Enemies Mine
Season 3 - Episode 17
Hunter Cain, Gatlocke, No Face, and Valve team up to take down Rex.
9.00 
#19 - Payback
Season 1 - Episode 21
Rex and Noah are aboard the Keep and returning to Providence HQ when news breaks of surprise attacks against major Providence bases around the world. Having lost his nature-controlling powers at Rex's hands (he has apparently manage to turn himself back into a E.V.O. through a as of yet unidentified means), Van Kleiss is out for revenge; he personally leads the Abysus forces which board the Keep. Rex counter attacks, but is restrained by Biowulf long enough for Van Kleiss to drain Rex of all his active nanites. This alters his powers into the mirror image of Rex's: as Rex is able to cure E.V.O's, Van Kleiss is now able to create them, which he demonstrates on Captain Calan. The depowered Rex is thrown from the Keep by Biowulf, but is rescued in midair by Six's jumpjet. Van Kleiss is determined to destroy Providence once and for all; the Keep is rammed into the HQ tower, and a heavy battle develops. Rex, Noah and Bobo escape in a jumpjet to Purgatory Base, where Rex risks his life by immersing himself in active nanites in order to reactivate his powers. The procedure seemingly activates the large, unusual nanite that Dr. Rylander had injected into him in Dark Passage. Providence HQ is about to fall; Van Kleiss makes it into the situation room, defeats Six, and dispatches Biowulf and Skalamander after White Knight and Dr. Holiday. Rex reappears and attacks Van Kleiss, manifesting a new, whip-like build granted by Rylander's nanite; he is able to use its abilities to disable Van Kleiss. Meanwhile Holiday takes down Skalamander by releasing her E.V.O. sister, and White Knight lures Biowulf into a trap. Van Kleiss is snatched to safety by an E.V.O., while Breach sets bombs throughout Providence as a diversion. Rex finds he is able to shut down the entire HQ with his new powers. Providence takes Biowulf, Skalamander, and many other E.V.O.s left behind into custody; Rex, back to his old self, cures Captain Calan. Rex is warmly commended by White Knight and confidently observes that while Van Kleiss may be back and more powerful than ever, so is he, and the war is not over yet.
8.90 
#20 - Alliance
Season 2 - Episode 4
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.
8.86 
#21 - A Family Holiday
Season 2 - Episode 15
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.
8.86 
#22 - Waste Land
Season 2 - Episode 2
On a mission to recover a set of nuclear reactor cores from a research ship, Rex and Six encounter an advanced civilization of marine E.V.O.s.
8.78 
#23 - Grounded
Season 2 - Episode 17
While the rest of Providence is off-site for training exercises, Rex is grounded. Noah convinces him to have a party, but can only deliver four hoodlums for guests. When an EVO intruder is found inside the base, it's up to the six of them to stop it.
8.75 
#24 - Lost Weekend
Season 2 - Episode 3
Providence Agent Kenwyn Jones and Rex are assigned an undercover mission to investigate an underground E.V.O. party. However, their unique way of getting things done soon causes problems and they must learn to work together.
8.71 
#25 - Divide by Six
Season 2 - Episode 6
Six asks for Rex's help to cure his old mentor, who's become an E.V.O.
8.64