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
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YouTube TV
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Spectrum On Demand
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Tubi TV
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Amazon Video
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Google Play Movies
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Fandango At Home
see all options Availability data: JustWatch
- Seasons
- 4
- Episodes aired
- 52
- Latest aired
- S04E13
- Total runtime
- 19h 38min
Timeline when each season aired
- Season 1 December 2005 – March 2006 13 episodes
- Season 2 May 2006 – October 2006 13 episodes
- Season 3 November 2006 – April 2007 13 episodes
- Season 4 July 2007 – April 2008 13 episodes
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S04E01 Perfect Day
July 7 · 22min find the promo
Show synopsis
Enoch and the Forever Knights return, putting Ben in a dream world where he's tricked into having the perfect day. However, his dream quickly turns into a nightmare.
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S04E02 Divided We Stand
July 14 · 22min find the promo
Show synopsis
Ben 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.
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S04E03 Don't Drink the Water
July 21 · 22min find the promo
Show synopsis
After 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.
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S04E04 Big Fat Alien Wedding
July 28 · 22min find the promo
Show synopsis
Ben, Gwen, and Grandpa Max attend a family wedding. During the ceremony, a strange alien attacks. Will the two ever finish this strange wedding?
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S04E05 Secret of the Omnitrix (1)
August 4 · 22min find the promo
Show synopsis
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.
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S04E06 Secret of the Omnitrix (2)
August 4 · 22min find the promo
Show synopsis
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.
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S04E07 Secret of the Omnitrix (3)
August 4 · 22min find the promo
Show synopsis
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.
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S04E08 Ben 4 Good Buddy
September 22 · 22min find the promo
Show synopsis
While on a desert highway, the RV gets stolen by a group of modern-day pirates, who use it to go on a robbery.
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S04E09 Ready to Rumble
September 29 · 22min find the promo
Show synopsis
When 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.
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S04E10 Ken 10
October 6 · 22min find the promo
Show synopsis
In 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.
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S04E11 Ben 10 vs. Negative 10 (1)
March 9 · 22min find the promo
Show synopsis
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.
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S04E12 Ben 10 vs. Negative 10 (2)
March 9 · 22min find the promo
Show synopsis
The Forever King sets his plan in motion and recruits the most powerful enemies Ben has ever faced in order to steal the world's most powerful energy source.
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S04E13 Goodbye and Good Riddance
April 15 · 22min find the promo
Show synopsis
The 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.