Back in Action: Alien Universe (or simply Back in Action) is the sequel series to Ben 10: Alien Universe announced on August 19, 2012 that premiered on August 29, 2012.
The series experienced a five-year hiatus but returned on October 4, 2019.
Accolades and Fans
Fan of Back in Action? Show the love by dropping a follow on Twitter @BackinActionAU.
|Featured Series||February 2012|
|Featured Episode: The Alternative||June 2018|
|Featured Episode: Ten Plus Twenty||November 2018|
|Featured Character: Sii||February 2019|
- Main article: List of Back in Action: Alien Universe episodes
2 seasons have been confirmed, arriving at 24 and 15 episodes (for a total of 39 episodes), respectively. 5 Shorts are also available.
17 year old Ben unravels the plot of the Thep Khufan Armada, and together with many of his closest friends and newest allies, he must thwart its shifty Commander or sacrifice the Earth and universe to him.
In the aftermath of a great loss, Ben is faced with troubles at home as a being armed with their own Omnitrix runs amok in Bellwood. Meanwhile, two infamous prisoners of Incarcecon in the Null Void are plotting their escape - Vilgax and Malevolence.
- Main article: List of Back in Action: Alien Universe characters
- Mercedes Barnes (Season 2)
- Maxwell "Grandpa Max" Tennyson
- Professor Paradox
- Eli (Season 2)
- Aion (Season 2)
- Future Ben Tennyson
- Chelsey Tennyson
- Karin Frikton
- Cooper Daniels
- Rook Blonko
- Verdona "Grandma Verdona" Tennyson
- Thep Khufan Commander Rex
- Sandra Tennyson
- Thep Khufan Commander Tersce Tenebrosi (Season 1)
- The Unleashed (Season 1)
- Albedo (Season 1)
- Elena Validus (Season 1)
- Malevolence (Season 2)
- Vilgax (Season 2)
- Dawn (Season 2, supporting in Season 1)
- Charmcaster (mostly neutral)
- Loitus (Season 1)
- Mistress (Season 1)
- Cyanne (originally a hero)
- Slix Beta (Season 2)
- Nightcaster II (Season 1)
- Clancy (Season 1)
Through the Assault Omnitrix, Ben has access to over 50 alien transformations, and Future Ben countless more. Bold aliens have been reunlocked since Recalibration with the new Assault Omnitrix.
Unique Additional Aliens
- Nigester (removed in Ten Plus Twenty)
Unique Ultimate Aliens
Season 2 Aliens
- "Titanium Alien"
- Several More Unique Unknown Aliens
- Four Arms
- Grey Matter
- Way Big
- Eye Guy
- Echo Echo
- Big Chill
- Alien X
- Water Hazard
- Forge (Armodrillo)
Classic Ultimate Aliens
- Ultimate Big Chill
- Ultimate Wildmutt
- Ultimate Cannonbolt
- Ultimate Swampfire
- Ultimate Echo Echo
- Ultimate Humungousaur
- Ultimate Way Big
- Ultimate Spidermonkey
- (See Future Ben's list of aliens)
Major Spells Used
Differences from canon
- Ben received the Assault Omnitrix instead of the final Omnitrix.
- Ben named his Talpaedan transformation Forge instead of Armodrillo.
- The Plumbers' origin on Earth happened differently, as explained in Foreverlasting.
- Carl Nesmith's Captain Nemesis was only a TV hero in this timeline, akin to Kangaroo Kommando.
- He did still become a very high-profile arms manufacturer and later super villain.
- Much of Omniverse did not transpire. Specific distinctions are mentioned throughout the series.
- Rook Blonko's partnership with Ben was much shorter, as will be partially explained in Can't Trust the Weather, Man.
- Where Omniverse erroneously continued with Ben still 16, in spite of too much time passing during Ultimate Alien, Back in Action proceeds with Ben instantly turning 17.
- Some of Ben's transformations have different appearances. Gwen's Anodite form also reprises its Alien Force/Ultimate Alien appearance.
- 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 attire.
- Articguana, Buzzshock, and Stinkfly have their original series appearances.
- While Primus and the Codon Stream act as backups, the Hidden Universe acts as a local hub for transformations, housing all available transformations. In this timeline, the Hidden Universe was available in the original Omnitrix and Assault Omnitrix but not the Ultimatrix.
- All canon "mutant" characters are alien hybrids.
- Gwen's school is instead called Dwayne University, in honor of Dwayne McDuffie.
- Hex is not a Professor at Gwen's school.
Second Run retcons
- Originally in Ten Plus Twenty, it was suggested a presidential election was forthcoming (lining up with the real world upcoming 2012 election). To align with some upcoming content in Season 2, it was changed to reference the incumbent president and a forthcoming midterm election.
- Originally, Malevolence's patterns were green. To distinguish from Julie/Ken and Upgrade, this was changed to purple befitting his former royalty.
- On YouTube, the show was referred to as Ben 10: Alien Universe Re-Animated.
- The logo was originally created by NickFusi0n.
- Every third episode is four parts. The premiere episode Infernosphere was first, followed by No Strings Attached. Plight of Pinocchio is next in line for this treatment.