|Back in Action: Alien Universe|
|Original run||August 29, 2012 -|
|Episodes||~54 (29 aired)|
| Preceded by|
"Ben 10: Alien Universe"
| Succeeded by|
"Untitled Third Alien Universe Series"
Back in Action: Alien Universe was the sequel series to Ben 10: Alien Universe announced on August 19, 2012 that premiered on August 29, 2012.
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- GIVE UP, STOLEN PLUMBER SHIP! YOU CAN'T ESCAPE FROM RATH! YAAH! (The ship begins to crash) CRASHING'S GOOD TOO! RATH CAN CRASH ALL DAY!! (Rath falls down) NOW YOU'RE USING GRAVITY!! WELL FORGET IT! YOU CAN'T BEAT RAA.. (slams into ground) 15:24, September 20, 2012 (UTC)
- OMNIVERSE (Wall - Blog - Contribs) 12:27, October 11, 2012 (UTC)
- I should've done this a long time ago....
- badadadada I'm lovin' it --I am the Ruler of all that belongs to the Light! The Photon Commander! (Wall - Blog - Contribs) 10:03, March 9, 2013 (UTC)
- Main article: Episode Guide
3 seasons have been confirmed at a total of 68 overall episodes. A movie, tentatively titled Back in Action: The Movie is also in early production, existing as a story to succede the series but precede the sequel.
17 year old Ben discovers the plot of the Thep Khufan Commander, and together with many of his closest friends and newest allies, he must thwart the Commander or sacrifice the Earth and universe to him.
- Ben Tennyson (16 y/o in Infernosphere; 17 y/o Limited on)
- Gwen Tennyson (16 y/o in Infernosphere; 17 y/o Limited on)
- Kevin Levin (18 y/o Limited on)
- Julie Yamamoto (Deceased; 16 y/o in Infernosphere, 17 y/o Limited-Ben 10: Alien Universe Unleashed)
- Chelsey Tennyson (21 y/o)
- Maxwell "Grandpa Max" Tennyson
- Future Ben Tennyson (22 y/o)
- Karin Frikton
- Professor Paradox
- Verdona "Grandma Verdona" Tennyson
- Cooper Daniels
Any alien in bold was originally kept a secret. As of its reveal, it is no longer, and is subtracted from the remaining secret classic alien counter. Any alien in a link is unique to the series.
- Echo Echo
- Big Chill
- Alien X
- Four Arms
- Grey Matter
- Way Big
- Eye Guy
- A few more secret classic aliens
- Water Hazard
- Forge (Armodrillo)
- Nigester (removed in Ten Plus Twenty)
- Ultimate Big Chill
- Ultimate Wildmutt
- Ultimate Cannonbolt
- Ultimate Swampfire
- Ultimate Echo Echo
- Ultimate Humungousaur
Season 2+ Aliens
- "Titanium Alien"
- Several More Unique Unknown Aliens
- (See Future Ben's list of aliens)
- Unless otherwise stated below, all Assault Omnitrix aliens assume their original series/Alien Force/Ultimate Alien (whichever is the latest) appearances. This also applies for Gwen's Anodite form.
- Grey Matter appears with his Omnitrix on his chest, as it would have had he appeared in Ultimate Alien. As of Hit and Miss, he has donned his Omniverse clothing but original series appearance.
- Upgrade bears great resemblance to Malware in Omniverse.
- Articguana, Buzzshock, and Stinkfly will appear with their original series appearances.
- The Rustbucket has been confirmed to be much more realistic.
- On YouTube, the show was referred to as Ben 10: Alien Universe Re-Animated.