Ben faces Tecadon killer robots that have been programmed to kill him. Each robot is more powerful than the last one. Ben's only chance to survive is for Gwen to find out who commissioned the robots.
20 years in the future, Eon attacks Ben 10,000, then disappears. Adult Ben travels back in time fearing Eon will attack his younger self, the present day Ben.
Ra'ad, the last of Aggregor's escaped prisoners, attacks Ben and informs the team of the true fate of his comrades. He finds a safe hiding place but one that endangers Ben in the process.
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Title: Ben 10: Ultimate Alien (2010–2012)
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| Series cast summary: | |||
| Yuri Lowenthal | ... | Ben Tennyson / ... 52 episodes, 2010-2012 | |
| Ashley Johnson | ... | Gwen Tennyson / ... 52 episodes, 2010-2012 | |
| Dee Bradley Baker | ... | Big Chill / ... 52 episodes, 2010-2012 | |
| Greg Cipes | ... | Kevin Levin / ... 51 episodes, 2010-2012 | |
| John DiMaggio | ... | Aggregor / ... 29 episodes, 2010-2012 | |
With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.
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Everyone says the Ben 10 series's are for boys from 7-12. I disagree. I'm a girl who started watching this when I was what, 9? And I've grown up with this show. I've always been worried about the next season not being as good as the last one, but i've never been disappointed. Good action, good plots, great jokes, awesome for kids of all ages. Maybe to lots of people it isn't good but that's mostly because they didn't grow up on the show! Give it a try! Ben can be very cocky sometimes, which can get on my nerves-and the way that Kevin is always turning bad gets really repetitive. Yet the show is growing up, along with the characters. There is drama for the older kids- action for everyone. It's one of the best shows out there, and I can't wait for the next episode. I just hope that the episodes to come will be creative and unique!