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Season guide

Ben 10: Season 4

13 episodes Premiered Jul 7, 2007 Updated Sep 28, 2026
Previously on Ben 10

Season 4 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Picks up essential narrative continuity directly following the events of Ben 10 Season 3.
  • ⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
  • ⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
  • ⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
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Season 4 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 4 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

23%
77%
Mytharc (3): Crucial lore & season climaxes
Core (10): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

Perfect Day

Jul 7, 2007 · 22 min

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.

S4·E2 Core

Divided We Stand

Jul 14, 2007 · 22 min

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

S4·E3 Core

Don't Drink the Water

Jul 21, 2007 · 22 min

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 f

S4·E4 Core

Big Fat Alien Wedding

Jul 28, 2007 · 22 min

Ben, Gwen, and Grandpa Max attend a family wedding. During the ceremony, a strange alien attacks. Will the two ever finish this strange wedding?

S4·E5 Core

Secret of the Omnitrix (1)

Aug 4, 2007 · 22 min

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 creato

S4·E6 Core

Secret of the Omnitrix (2)

Aug 4, 2007 · 22 min

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 creato

S4·E7 Core

Secret of the Omnitrix (3)

Aug 4, 2007 · 22 min

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 creato

S4·E8 Core

Ben 4 Good Buddy

Sep 22, 2007 · 22 min

While on a desert highway, the RV gets stolen by a group of modern-day pirates, who use it to go on a robbery.

S4·E9 Core

Ready to Rumble

Sep 29, 2007 · 22 min

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 on

S4·E10 Core

Ken 10

Oct 6, 2007 · 22 min

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.

S4·E11 Core

Ben 10 vs. Negative 10 (1)

Mar 9, 2008 · 22 min

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.

S4·E12 Mytharc

Ben 10 vs. Negative 10 (2)

Mar 9, 2008 · 22 min

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.

S4·E13 Mytharc

Goodbye and Good Riddance

Apr 15, 2008 · 22 min

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 Vi

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