All Ben 10 Alien Force Episodes ((link)) -

Ben 10: Alien Force: The Complete Episode Guide (All 46 Episodes)

When Ben 10: Alien Force premiered on Cartoon Network in April 2008, it marked a bold evolution for the franchise. Gone was the 10-year-old, shorts-wearing hero who shouted catchphrases. In his place stood a 15-year-old Ben Tennyson—more brooding, more responsible, and stripped of his trusty Omnitrix. The series successfully bridged the gap between childhood nostalgia and teen drama, introducing darker themes, complex villains (the High Breed), and a deeper roster of aliens.

Act I: The Legend Reawakens (Season 1)

The story begins five years after Ben Tennyson last wore the Omnitrix. He is no longer the ten-year-old hero; he is a mature, athletic teenager who has put his childhood adventures behind him. But peace is shattered when his grandpa, Max Tennyson, goes missing. Investigating his RV, Ben finds a holographic message: Max has been fighting a dangerous new threat, and he needs Ben to step up. all ben 10 alien force episodes

Ben loses control of the Omnitrix as Big Chill enters a reproductive cycle. Undercover Ben 10: Alien Force: The Complete Episode Guide

Episode 26: “War of the Worlds” (Part 2)

• Original Air Date: March 27, 2009
• Plot: Ben strikes a deal with the High Breed leader to save his people. He uses the Omnitrix’s repair function to rewrite the High Breed’s damaged DNA, making them fertile again. The war ends not with a genocide, but with a cure. In the final scene, a shadow falls over Earth—a familiar shape with tentacles and a single red eye. Vilgax has returned. To be continued in Ben 10: Ultimate Alien.

Season 1 (2008-2009)

1. Five Aliens Later (April 18, 2008) - Ben is recruited by the Plumbers to help fight villains.
2. Video Games (April 25, 2008) - Ben and Kevin play a video game that becomes all too real.
3. The Learning Curve (May 2, 2008) - Ben learns to control his alien forms.
4. The Four Arms (May 9, 2008) - Ben creates a new alien form, Four Arms.
5. The Biggest Alien of Them All (May 16, 2008) - Ben faces off against a giant alien.
6. The Swamp Thing (May 23, 2008) - Ben and Kevin investigate a mysterious swamp creature.
7. The Secret of the Four Aliens (May 30, 2008) - Ben learns about the history of the alien forms.
8. The High Override (June 6, 2008) - Ben and Kevin face off against a powerful villain.
9. The Hub (June 13, 2008) - Ben visits the Plumbers' headquarters.
10. The Prisoner (June 20, 2008) - Ben and Kevin rescue a captured Plumber.
11. The Incursean (June 27, 2008) - Ben faces off against an Incursean agent.
12. The Chameleon (July 4, 2008) - Ben and Kevin investigate a mysterious chameleon-like alien.
13. Mr. and Mrs. Cash (July 11, 2008) - Ben and Kevin go undercover.
14. The Vampire (July 18, 2008) - Ben faces off against a vampire-like alien.
15. The Football (September 29, 2008) - Ben and Kevin investigate a mysterious football.
16. The Boxed In (October 6, 2008) - Ben and Kevin face off against a villain who can trap people in boxes.
17. The Renegade (October 13, 2008) - Ben and Kevin team up with a former villain.
18. The Gwen (October 20, 2008) - Gwen becomes a target for a villain.
19. The Clockwork (October 27, 2008) - Ben and Kevin face off against a clockwork-like alien.
20. The Echo (November 3, 2008) - Ben and Kevin investigate a mysterious echo-like alien.
21. The Rise of Highbreed (November 10, 2008) - The Highbreed threaten the Earth.
22. The Highbreed Invasion (November 17, 2008) - The Highbreed invade the Earth.