Notable multi-episode arcs and pivotal episodes
Vilgax returns, and the series concludes with a final battle that leads into Ben 10: Ultimate Alien .
The group encounters Michael Morningstar, a "Plumber's kid" with sinister intentions.
If you grew up in the late 2000s, you remember the seismic shift. We traded the high-energy, cartoonish chaos of the original Ben 10 (2005) for something darker, sleeker, and more serialized. Enter Ben 10: Alien Force (2008).
Ben helps a "prince" retrieve a power source.