E1 - And Then There Were 10

Aired: December 27, 2005

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.

Aired: January 13, 2006

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

E3 - The Krakken

Aired: January 14, 2006

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

E4 - Permanent Retirement

Aired: January 21, 2006

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

E5 - Hunted

Aired: January 28, 2006

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

E6 - Tourist Trap

Aired: February 04, 2006

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

E7 - Kevin 11

Aired: February 11, 2006

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

E8 - The Alliance

Aired: February 18, 2006

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

E9 - Last Laugh

Aired: February 25, 2006

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

E10 - Lucky Girl

Aired: March 04, 2006

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

Aired: March 11, 2006

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

E12 - Side Effects

Aired: March 18, 2006

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

E13 - Secrets

Aired: March 25, 2006

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.