Ben 10

Season 4

TV-Y7

92%

When 10-year-old Ben Tennyson discovers a mysterious device, he gains the power to change into ten different alien heroes, each with uniquely awesome powers. With such abilities at his disposal, Ben realizes a greater responsibility to help others and stop evildoers, but that doesn't mean he's above a little superpowered mischief now and then.

Where to Watch Ben 10 • Season 4

13 Episodes

Perfect Day
E1
Perfect DaySome of Ben's old enemies attack a school bus. Ben easily defeats them, and the grateful cheerleaders thank him. It's the start of a perfect day for Ben. Or is it? Duplicates of Grandpa and Gwen show up and tell him he's been captured, he's in a dream world, and the culprits are keeping him there so they can get the Omnitrix. Can Ben distinguish between what is and isn't real?
Divided We Stand
E2
Divided We StandBen gains another Omnitrix hero to use, which he calls Ditto. Gwen can't stand being around the multiplying Dittos, and they end up giving her headaches. The Dittos, though, prove to be real helpful against Dr. Animo and his multiplying Stinkflies after he extracted some of Ditto's DNA.
Don't Drink the Water
E3
Don't Drink the WaterAfter being in contact with water from the Fountain of Youth, Grandpa Max and Ben are reverted to being kids again. Now, Gwen is left to take care of them while stopping Hex from finding the fountain's source.
Big Fat Alien Wedding
E4
Big Fat Alien WeddingBen, Gwen, and Grandpa Max attend a family wedding. During the ceremony, a strange alien attacks. Will the two ever finish this strange wedding?
Secret of the Omnitrix (1)
E5
Secret of the Omnitrix (1)During a battle with Dr. Animo, the Omnitrix is accidentally set to self-destruct. In order to stop it, Ben, Gwen, and Tetrax travel across spaceto track down the Omnitrix's creator, Azmuth.
Secret of the Omnitrix (2)
E6
Secret of the Omnitrix (2)With Myaxx, the former assistant to Azmuth, the inventor of the Omnitrix in tow, Ben, Gwen, Tetrax, and Gluto fly to the dangerous jungle worl Xenon to deactivate the Omnitrix's self-destruct mode, only for Vilgax to arrive with his army, hot on their trail.
Secret of the Omnitrix (3)
E7
Secret of the Omnitrix (3)During a battle with Dr. Animo, the Omnitrix is accidentally set to self-destruct. In order to stop it, Ben, Gwen, and Tetrax travel across spaceto track down the Omnitrix's creator, Azmuth.
Ben 4 Good Buddy
E8
Ben 4 Good BuddyThe Tennysons encounter a trio of merciless road pirates while traveling through the southwest. Their initial disinterest in Max' Rust Bucket turns when its performance in thwarting their aggression against an eye-catching RV exceeds expectation. Soon the pirates make it theirs, planning not just to burn up the highway with it but blow it up entirely. The Tennysons, along with a helpful waitress, engage in a high-speed chase to get it back.
Ready to Rumble
E9
Ready to RumbleWhen Ben accidentally breaks Gwen's laptop, he participates in the "Ultimate Wrestling Competition" as Four Arms to get the prize money for a new laptop to replace Gwen's broken one.
Ken 10
E10
Ken 10In the future, Ben gives his son, Ken, an Omnitrix for his 10th birthday. However, Ben will have to learn to trust him with that power.
Ben 10 vs. Negative 10 (1)
E11
Ben 10 vs. Negative 10 (1)Ben, Gwen, Cooper and Grandpa Max face their last battle ever against the villains they have encountered and they will battle to get the world's most powerful energy source.
Ben 10 vs. Negative 10 (2)
E12
Ben 10 vs. Negative 10 (2)With Cooper's help, the Tennysons protect the Plumber base beneath Mt. Rushmore as members of Negative 10 lay siege. Voice analysis confirms Grandpa Max's suspicion that the Forever King is Driscoll, a former Plumber who years ago was kicked out in disgrace.
Goodbye and Good Riddance
E13
Goodbye and Good RiddanceThe summer finally ends. Ben and Gwen have to go back to their normal lives. Grandpa Max tells Ben to keep the Omnitrix a secret from everyone, even his parents. Ben agrees, but Vilgax arrives and he'll stop at nothing to get the Omnitrix.