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Ben 10: Ultimate Alien Season 2 Episode 12

Prisoner #775 is Missing

The secrets of Area 51 are revealed to Ben Tennyson by Colonel Rosum after Old George infiltrates Area 51. (ChamAilen and Ultimate Wildmutt first appears in this episode).

Ben 10: Ultimate Alien Season 2 Episode 12

Apr. 29, 2011

2 - 33
The Ultimate Enemy (2)Mar. 31, 2012
2 - 32
The Ultimate Enemy Part 2Mar. 31, 2012
2 - 31
The Ultimate Enemy Part 1Mar. 24, 2012
2 - 30
The Beginning of the EndMar. 17, 2012
2 - 29
Night of the Living NightmareMar. 10, 2012
2 - 28
The Eggman ComethMar. 03, 2012
2 - 27
Catch a Falling StarFeb. 25, 2012
2 - 26
Couples RetreatFeb. 18, 2012
2 - 25
The Enemy of My FrenemyFeb. 11, 2012
2 - 24
Inspector #13Feb. 04, 2012
2 - 23
Solitary AlignmentDec. 09, 2011
2 - 22
A Knight to RememberDec. 02, 2011
2 - 21
The Mother of All VreedlesNov. 18, 2011
2 - 20
The Widening GyreNov. 04, 2011
2 - 19
Ultimate SacrificeOct. 28, 2011
2 - 18
The Perfect GirlfriendOct. 21, 2011
2 - 17
Double or NothingOct. 14, 2011
2 - 16
The Flame Keeper's CircleOct. 07, 2011
2 - 15
Greetings From TechadonSep. 30, 2011
2 - 14
Simian SaysSep. 23, 2011
2 - 13
The PurgeSep. 16, 2011
2 - 12
Prisoner #775 is MissingApr. 29, 2011
2 - 11
Moon StruckApr. 22, 2011
2 - 10
Ben 10,000 ReturnsApr. 15, 2011
2 - 9
It’s Not Easy Being GwenApr. 08, 2011
2 - 8
Basic TrainingApr. 01, 2011
2 - 7
The Creature from BeyondMar. 25, 2011
2 - 6
Revenge of the SwarmMar. 18, 2011
2 - 5
Girl TroubleMar. 11, 2011
2 - 4
The Big StoryMar. 04, 2011
2 - 3
Viktor: The SpoilsFeb. 18, 2011
2 - 2
Eye of the BeholderFeb. 11, 2011
2 - 1
The Transmogrification of EuniceFeb. 04, 2011