Ben 10 - S1 E1

2. Washington B.C.

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

3. The Krakken

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

4. Permanent Retirement

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

5. Hunted

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

6. Tourist Trap

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

7. Kevin 11

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

8. The Alliance

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

9. Last Laugh

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

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.

11. A Small Problem

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

12. Side Effects

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

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.