Seasons & episodes
S1 · E1Ben 10 Returns (1) 2008-04-18 · 23 min
Ben discovers that the Forever Knights are trading weapons with the DNAliens, while at the same time, Grandpa Max has mysteriously gone missing. He decides to return the Omnitrix on his wrist and go hero once again.
S1 · E2Ben 10 Returns (2) 2008-04-18 · 23 min
Ben, Gwen, and Kevin follow a lead that takes them to a secret base in the desert. There they hope to find Grandpa Max but instead find a Highbreed spaceship with a giant cannon.
S1 · E3Everybody Talks About the Weather 2008-04-26 · 23 min
Gwen discovers that Grandpa Max's badge is able to signal other Plumbers. However, by using it, they meet up with a familiar face, a pyronite.
S1 · E4Kevin's Big Score 2008-05-03 · 23 min
Kevin shatters Ben and Gwen's trust when he steals the Rust Bucket to sell for alien technology on the black market.
S1 · E5All that Glitters 2008-05-10 · 23 min
Grandpa Max leaves Ben a series of instructions to contact a team of heroes. Things go the wrong direction when they soon find them.
S1 · E6Max Out 2008-05-17 · 23 min
Gwen's older brother, Ken, is suddenly missing. As they look, they encounter a surprise leading to a shocking secret from the DNAliens.
S1 · E7Pier Pressure 2008-05-31 · 23 min
While Ben has a date with Julie, it is soon ruined when an alien named Ship makes trouble at the local fair.
S1 · E8What Are Little Girls Made Of? 2008-06-07 · 23 min
When Ben and Gwen learn that their grandmother Verdona is an alien being, Verdona insists that Gwen should come along with her to her home planet and improve her abilities. With this, Gwen is faced with a difficult decision between a human and alien life.
S1 · E9The Gauntlet 2008-06-14 · 23 min
When Ben stands up to Cash and JT, they soon discover a robotic gauntlet from Kevin's vehicle. With it, Cash decides to get back on Ben, although this time, it's more than just a joke.
S1 · E10Paradox 2008-07-05 · 23 min
A time experiment in the 1950s sends a bizarre monster to Ben's time. Now Ben, Gwen, and Kevin must team up with Paradox, a time traveling hero, to face off against the unstoppable creature.
S1 · E11Be-Knighted 2008-07-12 · 23 min
The Forever Knights secure a weapon in hopes of aiding them slay a dragon they have held captive.
S1 · E12Plumber's Helpers 2008-07-19 · 23 min
Freelance young Plumbers mistake Ben and his team as a threat.
S1 · E13X = Ben + 2 2008-08-31 · 23 min
An alien emperor plans to destroy the planet Earth for kidnapping his daughter. In order to save the planet, Ben must uncover the secrets of Alien X.
S2 · E1Darkstar Rising 2008-10-10 · 23 min
A new villain comes into town, his name is Darkstar, he commits some crimes and gets the team's attention fast
S2 · E2Alone Together 2008-10-17 · 23 min
During a battle Ben and an alien commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.
S2 · E3Good Copy, Bad Copy 2008-10-24 · 23 min
An alien impersonates Ben with hopes of using his Omnitrix to annihilate him.
S2 · E4Save The Last Dance 2008-11-07 · 23 min
Kevin asks Gwen to the school dance; Ben fears he's losing control of the Omnitrix.
S2 · E5Undercover 2008-11-14 · 23 min
Cooper is kidnapped by the DNAliens, who want him to build a mystery arch.
S2 · E6Pet Project 2008-11-21 · 23 min
To find and destroy the alien dragon species, the Forever Knights capture Ship to control a starship they built out of alien technology to locate their homeworld and destroy them.
S2 · E7Grounded 2008-11-23 · 23 min
When Ben's parents discover his ability to turn into aliens, they forbid him from using the Omnitrix and later ground him from using it again. Eventually Gwen is grounded too leaving Kevin to stop the DNAliens.
S2 · E8Voided 2008-12-05 · 23 min
After Gwen receives an S.O.S. from Helen, Ben must go into the Null Void to save her and Manny. Once there, he must find The Wrench in order to stop D'Void, who happens to be Ben's old enemy Dr. Animo
S2 · E9Inside Man 2008-12-12 · 23 min
Ben and the gang rescue a runaway prisoner of the DNAliens.
S2 · E10Birds of a Feather 2009-03-24 · 23 min
The gang helps the prince of the arachna-chimps regain power
S2 · E11Unearthed 2009-03-25 · 23 min
Ben cares for a baby monster and helps locate its parents before the DNAliens find it.