S1 E1 • Plus les choses changent (1/2)

After parting ways with Gwen and Kevin, Ben is assigned a new alien partner named Rook Blanko. Meanwhile, Khyber the Hunstman targets Ben as his next prey.

Première diffusion : 1 août 2012

S1 E2 • Plus les choses changent (2/2)

Rook and Ben find a mysterious alien city under Bellwood after stopping 3 alien crooks: Liam, Fistina, and Bubble Helmet from blowing up Mr. Baumann's superstore in a protection racket.

Première diffusion : 22 septembre 2012

S1 E3 • Ben fait des étincelles

The Megawhatts that Ben fought in his youth seek his help when they are being used as a power source for the villain Fistrick.

Première diffusion : 29 septembre 2012

S1 E4 • Une mise à jour à haut risque

Infiltrating the Plumbers' base, Khyber uploads footage of young Ben's encounter with a corrupted Mechomorph named Malware.

Première diffusion : 6 octobre 2012

S1 E5 • Je te propose un marché

Sunder returns.

Première diffusion : 13 octobre 2012

S1 E6 • C'était eux

Ben and Rook attempt to stop Dr Animo and his giant ants.

Première diffusion : 20 octobre 2012

S1 E7 • Au revoir et merci pour tous les smoothies

When Ben and Rook investigate a mysterious alien ghost ship, they discover that Argit and the Vreedle Brothers are fighting for possession of a doomsday device.

Première diffusion : 27 octobre 2012

S1 E8 • La fusion

Ben and Rook come across elastic, hot blooded aliens that plan to activate a volcano with a nuclear bomb engine.

Première diffusion : 3 novembre 2012

S1 E9 • Des prédateurs et des proies (1/2)

It is revealed that during a fight with Eleven-Year Old Ben Tennyson, Malware touched the Omnitrix symbol on Four Arms. After the battle, he went to Dr. Psychobos and made him create a prototype Omnitrix, the Nemetrix. Back in the present, after a heated argument, Ben and Rook go their separate ways, giving Khyber his best chance to capture Ben.

Première diffusion : 10 novembre 2012

S1 E10 • Des prédateurs et des proies (2/2)

While trapped in Khyber's ship, Khyber tells Ben that he needs different alien DNA to complete the evil incomplete version of the Omnitrix the Nemetrix. He also reveals that Dr.Psychobos assigned him to hunt down various species for DNA to transfer it to the Nemetrix.

Première diffusion : 17 novembre 2012

S1 E11 • La grande évasion

The Omnitrix begins to malfunction and goes haywire when Psychobos steals a piece of an Omnitrix core causing Rook to mutate into a half-Gourmand and a half-Revonnahgander after Ben 10 attempts to complete a transformation.

Première diffusion : 24 novembre 2012

S1 E12 • Pour le meilleur et pour le pire

Gwen and Kevin visit Bellwood. Kevin tells Ben that he must hide himself from The Tetramand Princess Looma as she is hunting him as Looma wishes to marry Kevin.

Première diffusion : 1 décembre 2012

S1 E13 • La partie de pêche

Magister Patelliday is kidnapped by pirates who rob ships and put them in giant glass bottles to sell them. They intend to devour Patelliday. Any attempts at rescue are hard, since they have a Krakken and a robot army.

Première diffusion : 8 décembre 2012

S1 E14 • Blukic et Driba vont chez Monsieur Jus de Fruits

Ben and Rook must stop Trumbipulor from gaining absolute power while Blukic and Driba set out to find Mr. Smoothy's.

Première diffusion : 15 décembre 2012

S1 E15 • La fête foraine

Ben and Rook are attacked by Khyber at a festival.

Première diffusion : 22 décembre 2012

S1 E16 • Croissance interrompue

Billy Billions turns Ben and Rook into kids again.

Première diffusion : 5 janvier 2013

S1 E17 • Les potes de l'espace

Ben and Rook visit Rook's family while Revohnnah is attacked by an old foe.

Première diffusion : 12 janvier 2013

S1 E18 • Ben, vice et versa

When Eon forces young Ben and teenage Ben to switch minds, only the time-traveling Professor Paradox can sort things out and help Ben stop Eon from taking over the timelines.

Première diffusion : 19 janvier 2013

S1 E19 • Dimensions

Ben meets an alternate version of himself while searching for a 23rd Mr. Smoothy's store.

Première diffusion : 26 janvier 2013

S1 E20 • Une livraison très spéciale

As payment for destroying his car, Mr. Baumann orders Ben to make deliveries for him without using the Omnitrix.

Première diffusion : 2 février 2013