Some sources split the series after Episode 20 (Absolute Power) as the end of Season 1, with the remaining episodes as Season 2.
The Forever Knights battle Dagon's Esoterica army in a massive war. Vilgax breaks the final seal, allowing Dagon to break free into the universe. Episode 50: "The Ultimate Enemy: Part 1"
Ma Vreedle unleashes 300 billion clones.
Whether you’re a first-time viewer or a nostalgic fan, deliver 52 half-hours of creative alien designs, genuine emotional stakes, and some of the best superhero action on Cartoon Network. From the desperation of “Absolute Power” to the cosmic scale of “The Final Battle,” this series proves why Ben Tennyson remains one of the most enduring heroes of the 21st century.
– Gwen leads the team through Ledgerdomain to stop Aggregor from obtaining the third piece. ben 10: ultimate alien all episodes
– Ultimate Kevin targets individual heroes and villains to absorb more power. Ben decides that Kevin is too dangerous to live and must be put down, causing a deep ideological rift between him and Gwen.
– The team travels to Pisces, a water planet, to protect the second piece of the Map of Infinity from Aggregor. Ben must use Ultimate Echo Echo to survive the ocean depths.
– Ra'ad, the lightning-wielding Andromeda alien, accidentally fuses his consciousness with Ben’s Ultimatrix, trapping Ben in an unstable mental and physical state while Aggregor closes in.
– The final piece of the Map is hidden inside a giant, shifting rubik's cube-like dimension created by Professor Paradox. Ben beats Aggregor to the piece, but Aggregor steals it back. Some sources split the series after Episode 20
Season 2: Interstellar Conflicts and the Secret of the Ultimatrix
The show ran from , following a 16-year-old Ben Tennyson after his secret identity is revealed to the world. It introduces the Ultimatrix , a device that allows Ben to transform his aliens into evolved "Ultimate" forms. Episode List by Season
– Techadon custom-made assassin robots continuously hunt Ben down to claim the Ultimatrix.
Ben's identity leak puts his family in danger. Classic villains like Zombozo, Charmcaster, and Vulkanus team up to target Ben’s mother. Episode 4: "Video Games" Episode 50: "The Ultimate Enemy: Part 1" Ma
– Ben accidentally bonds physically and mentally with Ra'ad, an electric amphibian alien.
– With Ben's identity public, his old rogue's gallery targets his family. Ben, Gwen, and Kevin must protect his parents from Zombozo, Charmcaster, and Vulkanus.
– Argit uses the incredibly naive, earthquake-generating alien Andreas to execute a protection racket against the Forever Knights.
The final episode was dedicated to the memory of Dwayne McDuffie , a crucial writer and producer for the series. Follow-up: The story continued in Ben 10: Omniverse .
Some sources split the series after Episode 20 (Absolute Power) as the end of Season 1, with the remaining episodes as Season 2.
The Forever Knights battle Dagon's Esoterica army in a massive war. Vilgax breaks the final seal, allowing Dagon to break free into the universe. Episode 50: "The Ultimate Enemy: Part 1"
Ma Vreedle unleashes 300 billion clones.
Whether you’re a first-time viewer or a nostalgic fan, deliver 52 half-hours of creative alien designs, genuine emotional stakes, and some of the best superhero action on Cartoon Network. From the desperation of “Absolute Power” to the cosmic scale of “The Final Battle,” this series proves why Ben Tennyson remains one of the most enduring heroes of the 21st century.
– Gwen leads the team through Ledgerdomain to stop Aggregor from obtaining the third piece.
– Ultimate Kevin targets individual heroes and villains to absorb more power. Ben decides that Kevin is too dangerous to live and must be put down, causing a deep ideological rift between him and Gwen.
– The team travels to Pisces, a water planet, to protect the second piece of the Map of Infinity from Aggregor. Ben must use Ultimate Echo Echo to survive the ocean depths.
– Ra'ad, the lightning-wielding Andromeda alien, accidentally fuses his consciousness with Ben’s Ultimatrix, trapping Ben in an unstable mental and physical state while Aggregor closes in.
– The final piece of the Map is hidden inside a giant, shifting rubik's cube-like dimension created by Professor Paradox. Ben beats Aggregor to the piece, but Aggregor steals it back.
Season 2: Interstellar Conflicts and the Secret of the Ultimatrix
The show ran from , following a 16-year-old Ben Tennyson after his secret identity is revealed to the world. It introduces the Ultimatrix , a device that allows Ben to transform his aliens into evolved "Ultimate" forms. Episode List by Season
– Techadon custom-made assassin robots continuously hunt Ben down to claim the Ultimatrix.
Ben's identity leak puts his family in danger. Classic villains like Zombozo, Charmcaster, and Vulkanus team up to target Ben’s mother. Episode 4: "Video Games"
– Ben accidentally bonds physically and mentally with Ra'ad, an electric amphibian alien.
– With Ben's identity public, his old rogue's gallery targets his family. Ben, Gwen, and Kevin must protect his parents from Zombozo, Charmcaster, and Vulkanus.
– Argit uses the incredibly naive, earthquake-generating alien Andreas to execute a protection racket against the Forever Knights.
The final episode was dedicated to the memory of Dwayne McDuffie , a crucial writer and producer for the series. Follow-up: The story continued in Ben 10: Omniverse .