The BEST Episodes of Ben 10: Ultimate Alien
Every episode ever - ranked by fan votes!
Last Updated: Sep 17, 2021
Network: Cartoon Network
Taking place a few weeks after where Ben 10: Alien Force leaves off, Ben 10: Ultimate Alien follows the now sixteen-year-old Ben. The Omnitrix has been destroyed and Ben must learn to master the secrets of the new Ultimatrix, a gauntlet-like version of the old Omnitrix that not only gives him access to all of his original powers and abilities, but also allows him to evolve his alien forms into even stronger and even more powerful versions (called "ultimate forms").
#1 - Catch a Falling Star
Season 2 - Episode 27 - Aired Feb 25, 2012
Movie star Jennifer Nocturne, who is not in her right mind, teams up with the evil Captain Nemesis.
9.08 
#2 - The Ultimate Sacrifice
Season 2 - Episode 19 - Aired Oct 28, 2011
The six Ultimate Forms demand their freedom from the Ultimatrix.
9.03 
#3 - Solitary Alignment
Season 2 - Episode 23 - Aired Dec 9, 2011
Azmuth reveals how Sir George got his sword and slayed Dagon, and the team decides to make a deal with the First Knight.
9.03 
#4 - Ben 10,000 Returns
Season 2 - Episode 10 - Aired Apr 15, 2011
Ben 10,000 returns to help Ben battle a new, dangerous threat.
9.02 
#5 - The Flame Keepers' Circle
Season 2 - Episode 16 - Aired Oct 7, 2011
Julie joins a fanatical group who, unbeknownst to her, have discovered Vilgax and worship him.
8.73 
#6 - Escape from Aggregor
Season 1 - Episode 5 - Aired May 21, 2010
The real story behind Aggregor and his escaped prisoners is revealed.
8.73 
#7 - Basic Training
Season 2 - Episode 8 - Aired Apr 1, 2011
Ben, Gwen, and Kevin are forced to go through basic training at the Plumbers' Academy.
8.71 
#8 - ...Nor Iron Bars a Cage
Season 1 - Episode 17 - Aired Nov 19, 2010
Old feelings resurface when Kevin returns to the Null Void that housed him for years.
8.70 
#9 - It's Not Easy Being Gwen
Season 2 - Episode 9 - Aired Apr 8, 2011
A day in the hectic life of Gwen Tennyson.
8.68 
#10 - The Purge
Season 2 - Episode 13 - Aired Sep 16, 2011
Old George brings the Forever Knights in one group in order to vanquish every alien being on Earth.
8.67 
#11 - The Creature from Beyond
Season 2 - Episode 7 - Aired Mar 25, 2011
An evil creature released from another dimension has plans to enslave the human race for its master.
8.65 
#12 - The Widening Gyre
Season 2 - Episode 20 - Aired Nov 4, 2011
The team battles a new, dangerous threat in the Pacific Ocean.
8.63 
#13 - Eye of the Beholder
Season 2 - Episode 2 - Aired Feb 11, 2011
When Baz-El gets captured, it's up to Ben and the others to rescue him.
8.62 
#14 - Greetings from Techadon
Season 2 - Episode 15 - Aired Sep 30, 2011
Ben finds himself in an inescapable situation when Techadons, custom-made to destroy him, start coming after him.
8.56 
#15 - The Ultimate Enemy: Part 2
Season 2 - Episode 32 - Aired Mar 31, 2012
Vilgax betrays Dagon so that he can absorb all of his power to destroy his one true enemy: Ben Tennyson.
8.52 
#16 - Prisoner Number 775 is Missing
Season 2 - Episode 12 - Aired Apr 29, 2011
The team takes a look at the real purpose of Area 51 and have to recapture an escaped alien prisoner.
8.51 
#17 - The Forge of Creation
Season 1 - Episode 16 - Aired Nov 12, 2010
When Aggregor goes after the limitless power of Alien X, the gang are forced to do whatever it takes...
8.51 
#18 - The Eggman Cometh
Season 2 - Episode 28 - Aired Mar 3, 2012
Dr. Animo returns with an army of dragon-like mutants, while Ben has his own problems with his new transformation, Juryrigg.
8.47 
#19 - Enemy of My Frenemy
Season 2 - Episode 25 - Aired Feb 11, 2012
Ben, Gwen, and Kevin set out to rescue Charmcaster from Ledgerdomain, but, unbeknownst to them, Charmcaster has plans of her own.
8.46 
#20 - Inspector 13
Season 2 - Episode 24 - Aired Feb 4, 2012
A mysterious weapon master from Techadon visits Earth and wants the Ultimatrix to enhance his creations.
8.45 
#21 - Moonstruck
Season 2 - Episode 11 - Aired Apr 22, 2011
Max tells the kids about his first encounter with aliens and the story of how he and Verdona met and fell in love.
8.43 
#22 - Couples Retreat
Season 2 - Episode 26 - Aired Feb 18, 2012
Darkstar finds his way into Ledgerdomain, where he seduces Charmcaster, using her energies in his latest attempt to destroy Ben, Gwen, and Kevin.
8.40 
#23 - The Beginning of the End
Season 2 - Episode 30 - Aired Mar 17, 2012
The Flame Keepers' Circle try to release Dagon from his dimension, but Vilgax is released instead.
8.40 
#24 - Night of the Living Nightmare
Season 2 - Episode 29 - Aired Mar 10, 2012
Albedo tries to reclaim the Ultimatrix from Ben by transporting him into one of his own worst nightmares.
8.39 
#25 - The Perfect Girlfriend
Season 2 - Episode 18 - Aired Oct 21, 2011
The nanochips are back, and have disguised themselves as Julie.
8.33