The first season establishes the new status quo, introducing a more mature Ben, a powerful Gwen, and an unlikely ally in former rival Kevin Levin. Episode Title Key Events Ben finds Grandpa Max's badge and meets Magister Labrid. Ben 10 Returns, Part 2 The team discovers a secret DNAlien base. Everybody Talks About the Weather Ben meets Alan Albright, the first "Plumber’s Helper". Kevin's Big Score Kevin betrays the team to retrieve important tech. All That Glitters Introduction of Mike Morningstar (Darkstar). Max Out The team finds Grandpa Max in a Highbreed facility. Pier Pressure Ben goes on a date with Julie and encounters Ship. What Are Little Girls Made Of? Gwen discovers her Anodite heritage from Grandma Verdona. The Gauntlet School bullies Cash and JT acquire dangerous alien tech. Paradox Introduction of Professor Paradox, a time-travelling hero. Be-Knighted The team helps an alien Dragon escape the Forever Knights. Plumbers' Helpers Ben meets Manny and Helen, two rogue hybrid heroes. X = Ben + 2 The debut of the reality-warping Alien X . Season 2: War of the Worlds (13 Episodes)
The second season focuses on the escalating war against the Highbreed and deeper explorations of the Omnitrix’s origins. Episode Title Key Events Morningstar returns with a new, hungrier form. Alone Together Ben and a Highbreed commander must survive a desert planet. Good Copy, Bad Copy Introduction of Albedo, Ben’s Galvan double. Save the Last Dance Big Chill’s necrofriggian reproductive cycle begins. Undercover The team rescues Cooper from a DNAlien project. Pet Project Forever Knights attempt to weaponize Ship. Grounded Ben’s parents discover his secret identity. Voided Ben enters the Null Void to stop a familiar foe. Inside Man A human/DNAlien hybrid seeks the team's help. Birds of a Feather Ben teams up with Prince Simian of the Arachnichimps. Unearthed A giant baby alien causes chaos on Earth. War of the Worlds, Part 1 The Highbreed invasion begins in earnest. War of the Worlds, Part 2 Ben heals the Highbreed's genetic decay, ending the war. all ben 10 alien force episodes
From the moment Ben puts the Omnitrix back on to the emotional series finale, the show delivered 46 episodes of pure animated gold. Whether you are re-watching for the nostalgia or introducing a new generation to the DNAliens, here is your breakdown of the series that changed the franchise forever. The first season establishes the new status quo,