Season 1
Episodes • 2005

1. And Then There Were 10
23 minAverage 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.
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2. Washington B.C.
23 minBen must fight Dr. Animo, a crazed scientist who has a DNA-altering device.
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3. The Krakken
23 minBen has his hands full with a giant sea monster and an evil poacher.
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4. Permanent Retirement
23 minBen must rescue his aunt and grandfather when they are held hostage by shape-shifting aliens.
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5. Hunted
23 minBen is pursued by three bounty hunters sent by Vilgax to steal the Omnitrix.
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6. Tourist Trap
22 minBen accidentally releases creatures made of electric energy and must use his own powers to recapture them.
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7. Kevin 11
22 minBen meets a mutant who can absorb any form of energy and may be after the Omnitrix.
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9. Last Laugh
23 minBen discovers an evil circus that's headed by a psychic vampire clown named Zombozo.
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10. Lucky Girl
23 minBen battles a sorcerer who possesses a number of charms, and Gwen suddenly becomes a superhero when one of the charms falls into her hands.
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11. A Small Problem
23 minBen gets revenge on an amusement-park attendant who said he was too small to go on a ride.
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12. Side Effects
22 minBen's summer cold causes strange physical changes in his alien personas.
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13. Secrets
23 minVilgax tries to get the Omnitrix for himself while Grandpa Max's strange past becomes known, causing a showdown between Vilgax and the Tennyson family.
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