Season 1

1. 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.

2005-12-27 • 23 min

2. Washington B.C.

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

2006-01-13 • 23 min

3. The Krakken

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

2006-01-14 • 23 min

4. Permanent Retirement

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

2006-01-21 • 23 min

5. Hunted

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

2006-01-28 • 23 min

6. Tourist Trap

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

2006-02-04 • 22 min

7. Kevin 11

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

2006-02-11 • 22 min

8. The Alliance

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

2006-02-18 • 22 min

9. Last Laugh

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

2006-02-25 • 23 min

10. 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.

2006-03-04 • 23 min

11. A Small Problem

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

2006-03-11 • 23 min

12. Side Effects

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

2006-03-18 • 22 min

13. 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.

2006-03-25 • 23 min