Two rogue Plumber's Kids mistake Ben’s team for evil aliens and attack them.
Whether you're looking to binge-watch the series for the first time or you're a veteran fan revisiting the , here is everything you need to know about all Ben 10: Alien Force episodes across its three-season run. Season 1: The Return of the Hero all ben 10 alien force episodes
Gwen forces Kevin to take her to her high school spring formal dance. Meanwhile, Ben's Necrofriggian alien form, Big Chill, takes complete control of his mind, flying around the city eating metal to build a nest for newborn alien offspring. 18. Undercover Two rogue Plumber's Kids mistake Ben’s team for
Gwen’s brother Ken goes missing, leading the team to a Highbreed factory where Grandpa Max makes a massive sacrifice. Meanwhile, Ben's Necrofriggian alien form, Big Chill, takes
— The Incursean Emperor threatens to destroy Earth unless his kidnapped daughter Attea is returned. During the rescue, a dam breaks, and Ben transforms into the untested Alien X to stop the flood. Though Alien X can warp reality, Ben finds himself trapped in endless debate with its two other personalities, Bellicus and Serena. Only after convincing Serena to let him transform back into Swampfire does Ben resume the fight and save Earth. Omnitrix debut: Alien X.
– Ben tries to take Julie on a date while fighting a rogue Galvanic Mechamorph named Ship.
The team meets Alan Albright, a half-human, half-Pyronite Pyronite hybrid blamed for local crop circles.