Ben 10

S1 · E1
And Then There Were 10

Average kid, ten year old Ben Tennyson, his Grandpa Max and his cousin Gwen's summer of adventure takes an odd turn when Ben discovers a watch like object that has been jettisoned from alien spacecraft high above the Earth.

S1 · E2
Washington B.C.

Ben must fight Dr. Animo, a crazed scientist who has a DNA-altering device.

S1 · E3
The Krakken

Ben has his hands full with a giant sea monster and an evil poacher.

S1 · E4
Permanent Retirement

Ben must rescue his aunt and grandfather when they are held hostage by shape-shifting aliens.

S1 · E5
Hunted

Ben is pursued by three bounty hunters sent by Vilgax to steal the Omnitrix.

S1 · E6
Tourist Trap

Ben accidentally releases creatures made of electric energy and must use his own powers to recapture them.

S1 · E7
Kevin 11

Ben meets a mutant who can absorb any form of energy and may be after the Omnitrix.

S1 · E8
The Alliance

Ben clashes with a female gang member who's become part cyborg.

S1 · E9
Last Laugh

Ben discovers an evil circus that's headed by a psychic vampire clown named Zombozo.

S1 · E10
Lucky Girl

Ben battles a sorcerer who possesses a number of charms, and Gwen suddenly becomes a superhero when one of the charms falls into her hands.

S1 · E11
A Small Problem

Ben gets revenge on an amusement-park attendant who said he was too small to go on a ride.

S1 · E12
Side Effects

Ben's summer cold causes strange physical changes in his alien personas.

S1 · E13
Secrets

Vilgax tries to get the Omnitrix for himself while Grandpa Max's strange past becomes known, causing a showdown between Vilgax and the Tennyson family.