– Tetrax (the Diamondhead bounty hunter) returns to Earth and shatters Chromastone to extract a hidden crystal, revealing that Chromastone is part of a planetary resurrection system.
Ben must attend a school dance while secretly tracking a DNAliens nest beneath the gym. Meanwhile, Gwen struggles with her feelings for Kevin. Key moment: Kevin and Gwen share their first kiss.
In a final act of defiance, Ben infiltrates Vilgax's ship and triggers the Omnitrix's self-destruct sequence, destroying it along with his power. The explosion not only defeats Vilgax but also reverts Kevin to his human form, finally freeing him from his monstrous mutations. The episode ends on a hopeful note as Gwen and Kevin share their first kiss. The Omnitrix's destruction sets the stage for the next series, Ben 10: Ultimate Alien , in which Ben receives the more powerful Ultimatrix. all ben 10 alien force episodes
- The team faces a major loss, and Gwen's brother Ken is introduced.
Below is a drafted list of all episodes by season, which you can use for a guide, blog post, or watchlist: Season 1 (13 Episodes) – Tetrax (the Diamondhead bounty hunter) returns to
– Ben and a Highbreed commander named Reinrassic III are accidentally teleported to a brutal desert planet. They are forced to rely on each other to survive, changing the Highbreed's outlook on "lesser" species.
Gwen meets her grandmother, Verdona, discovering that her magical powers actually stem from her alien Anodite heritage. Key Debut: Verdona and the Anodite race. Episode 9: "The Gauntlet" Key moment: Kevin and Gwen share their first kiss
Ben absorbs Ghostfreak but successfully fights off his mental takeover. Episode 37: Trade-Off
– A species of small, gold-pooping aliens visits Earth for a festival, but eating meat turns one of them into a massive rampaging monster.
The team investigates a crashed spaceship carrying a rare metal called “Taydenite.” They encounter a shapeshifting alien criminal named Xylene (an old friend of Grandpa Max). Key moment: Gwen learns her mana (energy-based magic) can be weaponized.