Ben10: Alien Force Season 1

15 year old Ben Tennyson must utilize the Omnitrix yet again in order to locate his missing Grandpa Max, along with his cousin Gwen and former enemy Kevin 11.

Season 1, Episode 1: Ben 10 Returns
Original Air Date—18 April 2008
For 5 years, Ben Tennyson has lived a normal life without the Omnitrix. He goes to visit his Grandfather, only to find he's gone, and he's left a message for Ben. A plumber shows up, who tells Ben there's renewed alien activity on Earth, and he was working with Ben's grandfather to solve the case. Ben and Gwen team up to find their Grandfather, and get help from an unlikely source.

Season 1, Episode 2: Ben 10 Returns, Part 2
Original Air Date—18 April 2008
As Ben adjusts to the new Omnitrix, the team searches for clues to the alien plot on Earth hoping to find Grandpa Max.

Season 1, Episode 3: Everybody Talks About the Weather
Original Air Date—26 April 2008
The team gets a signal from the Plumber's badge. Suspecting it's from Grandpa Max, they investigate. They find a boy who can change into Heatblast. He's being pursued by the local Police who blame him for a string of fires and crop circles. As the team investigates the crop circles they learn more about the alien conspiracy.

Season 1, Episode 4: Kevin's Big Score
Original Air Date—3 May 2008
While making repairs to the Rustbucket, Kevin steals it. He plans to use it as collateral for some other technology, but it gets stolen from him. Ben and Gwen go after Kevin.

Season 1, Episode 5: All That Glitters
Original Air Date—10 May 2008
Ben and his friends comes across Mike Morningstar after rescuing a girl from nearly being run over by a truck. He's revealed to be a Plumber and both he and Gwen immediately trust him right away. Unfortunately, Kevin is the only one who sees through his charade and calls him out. When Gwen is drained of her magical energy and reduced to being Mike's slave as a zombie. It isn't long until Ben realizes that Kevin was right to have mistrusted Mike from the start.

Season 1, Episode 6: Max Out
Original Air Date—17 May 2008
Ken, Gwen's brother, stops in a small town for engine repairs. Grandpa Max arrives first to help. Ben and the others soon arrive. They'll learn more about the alien conspiracy and heavy price will be paid to stop it.

Season 1, Episode 7: Pier Pressure
Original Air Date—31 May 2008
Ben goes out on a date. All does not go as well as he'd like when objects start attacking him, and he's forced to go hero to protect himself and try to keep his secret from his date.

Season 1, Episode 8: Be-Knighted
Original Air Date—12 July 2008
A dragon escapes from the Forever Knights, and they ask Ben for help tracking down/killing the beast. The team learns why the Knights were formed. The hunt for the dragon reveals other surprises.

Season 1, Episode 9: What Are Little Girls Made Of?
Original Air Date—7 June 2008
While relaxing near a secluded spot where Grandpa Max used to take Ben & Gwen, they notice a mysterious figure leaving flowers. When they try to make contact, the mystery person eludes them, they soon learn it's their Grandmother. She reveals some family secrets, and has a very special offer for Gwen.

Season 1, Episode 10: The Gauntlet
Original Air Date—14 June 2008
The team destroys some alien armor that runs amok. They store it to keep safe. But someone who used to bully Ben manages to find it and cause trouble for everyone.

Season 1, Episode 11: Plumber's Helpers
Original Air Date—19 July 2008
Two plumber's children are taking down all aliens. Now they have their sites set on the team. The team has to fight Ben's old alien forms, Four Arms and XLR8.

Season 1, Episode 12: Paradox
Original Air Date—5 July 2008
An abandoned military base leads to an encounter with a self-proclaimed hero and a mysterious creature that ages people and objects. The team must stop the creature and help the hero who claims they've met before and will meet again.

Season 1, Episode 13: X Equals Ben Plus 2
Original Air Date—31 August 2008
Alien Bounty Hunter Seven Seven is after an alien princess. Her father will stop at nothing to get her back, including threatening Earth with destruction if she's not returned safely. When a major crisis arises, Ben uses Alien X for the first time. Ben learns about his most powerful alien form, and everything that comes with it.