The Ultimatrix goes wild as old and new aliens get in on the action! When Area 51 disappears, it's up to Ben to sniff out an escaped alien prisoner and go Ultimate Wildmutt on him. Then the ultimate aliens turn the tables on Ben and demand their freedom from the Ultimatrix. When he finally gets his gang under control, Ben discovers Vilgax is up to his old tricks. Looks like it's time to break out his new alien, Fasttrack, and race to the rescue.