Season 1

E1. And Then There Were 10

Dec 27, 2005 · 23m

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.

E2. Washington B.C.

Jan 13, 2006 · 23m

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

E3. The Krakken

Jan 14, 2006 · 23m

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

E4. Permanent Retirement

Jan 21, 2006 · 23m

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

E5. Hunted

Jan 28, 2006 · 23m

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

E6. Tourist Trap

Feb 4, 2006 · 22m

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

E7. Kevin 11

Feb 11, 2006 · 22m

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

E8. The Alliance

Feb 18, 2006 · 22m

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

E9. Last Laugh

Feb 25, 2006 · 23m

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

E10. Lucky Girl

Mar 4, 2006 · 23m

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.

E11. A Small Problem

Mar 11, 2006 · 23m

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

E12. Side Effects

Mar 18, 2006 · 22m

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

E13. Secrets

Mar 25, 2006 · 23m

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.