– Ben puts on the recalibrated Omnitrix to find his missing Grandpa Max.
– The Plumbers' Helpers are sent to a space station to stop an apparently rogue Ben Tennyson.
Kevin and Darkstar team up to find an artifact that will cure both of their mutated, disfigured states.
(S3E6, Oct 16, 2009) – Repo men try to reclaim Ship from Julie. Ben and Kevin go to court while Gwen and Julie defend Ship physically. all ben 10 alien force episodes
(S3E5, Oct 9, 2009) – An alien named Probity asks Ben to end the endless war ravaging her planet. Ben must find a diplomatic solution, not a violent one.
Heatblast (via Alan) and the concept of plumber's kids. Episode 4: "Kevin's Big Score"
Gwen steals a spellbook from Hex to travel back in time and prevent Kevin's mutation, accidentally creating a dystopian alternate timeline. – Ben puts on the recalibrated Omnitrix to
(S2E12, Mar 27, 2009) – The Highbreed fleet heads for Earth. Ben assembles all his allies for a final stand. Azmuth reveals the Omnitrix is a tool for peace, not war.
Ben discovers Grandpa Max is missing and uncovers a plot involving DNAliens and Forever Knights. He reboots the Omnitrix, unlocking a brand-new roster of aliens, and forms an alliance with former rival Kevin Levin and cousin Gwen.
An Incursean warship threatens to destroy the Earth. To stop it, Ben unlocks his most powerful alien, Alien X, but finds himself trapped in a mental deadlock between the alien's two inner personalities, Bellicus and Serena. Season 2: The Highbreed War (Episodes 14–26) (S3E6, Oct 16, 2009) – Repo men try
— The Forever Knights capture Ship to use its advanced technology. Ben, Gwen, Kevin, and Julie team up to rescue their alien pet.
Vilgax returns, more powerful than ever, having conquered ten worlds. He challenges Ben to a formal duel for the fate of the Earth. Ben attempts to hack the Omnitrix to unlock its master control, resulting in an explosion that mutates Kevin into a geometric monster and releases several rogue aliens. Ben ultimately manages to defeat Vilgax using Diamondhead.
— Ben's parents catch him transforming into Swampfire and forbid him from using the Omnitrix. Ben tries to sneak out of the house as Echo Echo , only to be caught and grounded. After Kevin struggles alone against the Highbreed, Ben's parents realize he's the only one who can save the world and allow him to continue protecting the planet.
— The explosive Season 2 finale . Ben devises a plan to capture the Highbreed Earth Commander and force a full retreat. During the final battle, Kevin is threatened, and an enraged Gwen releases her dormant Anodite self for the first time. Ben and the team fight their way into the Highbreed Control Tower. After defeating the Commander, Ben discovers the tragic truth: the Highbreed are dying from genetic degradation. Using the Omnitrix, Ben repairs their damaged DNA, ending the war not through destruction, but through mercy .
Ben 10: Alien Force represents a pivotal evolution in Cartoon Network's legendary franchise. Created by Man of Action and developed by Dwayne McDuffie and Glen Murakami, the series jumps five years into the future. A now 15-year-old Ben Tennyson must don the Omnitrix once again to face a clandestine alien invasion.