The following is a list of episodes for the American animated television series Ben 10. The series was created for Cartoon Network by "Man of Action", a group composed of writers Duncan Rouleau, Joe Casey, Joe Kelly and Steven T. Seagle. The series was followed by the 2008 sequel series Ben 10: Alien Force.
10-year-old Ben Tennyson begins summer vacation with his 10-year-old cousin Gwen and his grandfather Max. He wanders off and finds an alien pod that has crashed to earth, and within it a watch-like alien artifact. When he reaches to touch it, the watch jumps onto his wrist and refuses to come off, merging with his DNA. Ben accidentally discovers that it can change his form into various alien creatures and quickly learns how to use it, protecting people from robots sent by Vilgax to retrieve the watch. Deciding he can be a real-life superhero, Ben begins a summer full of extraterrestrial adventures for himself, Max and Gwen.
Ben overuses the watch and doesn't have any power left when Dr. Animo, a disgruntled scientist, brings creatures from the Natural History Museum in Washington, D.C. to life. Ben eventually defeats him, and learns that being a hero doesn't always come with rewards.
When Ben and Max go on a fishing trip with Captain Shaw, they encounter the Krakken that lives in the lake. With Gwen's help they find out that the creature is upset because Jonah Melville, a poacher pretending to be an animal lover, is stealing its eggs.