第 2 季 共 32 集
播出时间：2011年2月5日
第 1 集 The Transmogrification of Eunice
播出时间：2011年2月5日
A mysterious alien girl named Eunice has no memory and is being hunted by Sunder. While evading Sunder, Ben soon discovers that Eunice has nature-based abilities.
第 2 集 Eye of the Beholder
播出时间：2011年2月12日
Ben, Julie and the rest of the heroic crew embark on a dangerous journey that could cost them all their lives in an effort to achieve the safe return of Ship and his former owner Baz-L.
第 3 集 Viktor: The Spoils
播出时间：2011年2月19日
The King of Zarkovia asks the team for help with a civil war. The team agrees to help when they find out Dr. Viktor may be involved.
第 4 集 The Big Story
播出时间：2011年3月5日
Jimmy Jones is looking for the biggest new story he and Ben can tackle, but thats when he stumbles upon a strange pink tentacled creature which crashed from the sky into a near by cave.
第 5 集 Girl Trouble
播出时间：2011年3月12日
Gwen is excited by the prospect of her cousin Sunny paying the team a visit while dealing with the Robots of Dimension 12. But her excitement quickly turns into trepidation when it is uncovered that her cousin is not all that she appears and has some particularly sinister intentions.
第 6 集 Revenge of the Swarm
播出时间：2011年3月19日
Victor Validus resurfaces and attacks Ben at night. Elena Validus and the nanochips return.
第 7 集 The Creature from Beyond
播出时间：2011年3月26日
The Forever Knights unleash an evil force mistaken for an ancient weapon.
第 8 集 Basic Training
播出时间：2011年4月2日
Ben, Gwen, and Kevin are summoned to a Plumbers' Academy to go under training that is supervised by Magister Hulka.
第 9 集 It's Not Easy Being Gwen
播出时间：2011年4月9日
Gwen has always been a multi-tasker, trying to juggle school, hobbies, friends and her work as a hero, waking up early and going to sleep late. But Gwen's already packed day is about to get worse when Dr. Animo attacks with an army of giant frogs and Gwen is forced to make a hard choice.
第 10 集 Ben 10,000 Returns
播出时间：2011年4月16日
Following a visit from Paradox after a fight with Eon, Ben 10,000 arrives 20 years from the future to seek the aid of his past counterpart in tracking down Eon.
第 11 集 Moon Struck
播出时间：2011年4月23日
Grandpa Max tells the team about his first UFO encounter, which led him to meet Verdona.
第 12 集 Prisoner #775 Is Missing
播出时间：2011年4月30日
After a base is attacked, Max is infuriated when they learn it was a secret alien prison facility. While Max argues with the officer in charge, the team tries to locate an escaped prisoner.
第 13 集 The Purge
播出时间：2011年9月17日
Old George, the original Forever Knight, reclaims his position, and orders the Knights to remove all aliens on Earth.
第 14 集 Simian Says
播出时间：2011年9月24日
Simian asks the team for help when a DNAlien takes over his home world.
第 15 集 Greetings from Techadon
播出时间：2011年10月1日
Ben faces Tecadon killer robots that have been programmed to kill him. Each robot is more powerful than the last one. Ben's only chance to survive is for Gwen to find out who commissioned the robots.
第 16 集 The Flame Keeper's Circle
播出时间：2011年10月8日
Julie gets Ben to visit a charity organization who wants to improve the world with alien technology. Ben soon discovers the charity's benefactor is an old enemy.
第 17 集 Double or Nothing
播出时间：2011年10月15日
Ben finds out there's a new show called 'Ben 10: Live." He finds an old enemy running the show and cashing in on his fame.
第 18 集 The Perfect Girlfriend
播出时间：2011年10月22日
Julie suddenly leaves a tennis tournament and spends all her time with Ben.
第 19 集 The Ultimate Sacrifice
播出时间：2011年10月29日
Ben's Ultimate transformations have developed their own personalities. Now they want their freedom from Ben.
第 20 集 The Widening Gyre
播出时间：2011年11月5日
Colonel Rozum asks the team to investigate an island of garbage where people have been disappearing.
第 21 集 The Mother of All Vreedles
播出时间：2011年11月19日
Ma Vreedle goes to Earth to expand her family by creating clones and using all the water on Earth.
第 22 集 A Knight to Remember
播出时间：2011年12月3日
The Flame Keepers realize their mistake too late. Vilgax wants the power of Daigon. The Forever Knights are out to destroy Daigon. Ben and the team try to sort things out.
第 23 集 Solitary Alignment
播出时间：2011年12月10日
Azmuth reveals the origin of the sword and how he first encountered Old George. Ben comes to a decision on how to handle the Daigon.
第 24 集 Inspector #13
播出时间：2012年2月5日
A Techadon weapon master comes to Earth and wants the Ultimatrix.
第 25 集 The Enemy of My Frenemy
播出时间：2012年2月12日
Gwen and co revisit Legerdomain in hopes of rescuing Charmcaster.
第 26 集 Couples Retreat
播出时间：2012年2月19日
Charmcaster and Darkstar team up to destroy Ben, Gwen and Kevin.
第 27 集 Catch a Falling Star
播出时间：2012年2月26日
Movie starlet Jennifer Nocturne is recaptured by the evil Captain Nemesis!
第 28 集 The Eggman Cometh
播出时间：2012年3月4日
Dr. Animo returns!
第 29 集 Night of the Living Nightmare
播出时间：2012年3月11日
Albedo attempts to get the ultimatrix by invading Ben's mind.
第 30 集 The Beginning of the End
播出时间：2012年3月18日
The final battle between the Forever Knights and Dagon's Esoterica is in full swing, with Ben caught in the middle!
第 31 集 The Ultimate Enemy (1)
播出时间：2012年3月25日
The Forever Knights battle Diagon's Esoterica, and Ben's plan to help the knights fails.
第 32 集 The Ultimate Enemy (2)
播出时间：2012年4月1日
After defeating Vilgax, Ben battles Dagon in his True Form as Ultimate Way Big.
