Ben 10: Alien Force takes place five years after the events of the original series. Ben, now a teenager, is still fighting crime with the help of his alien forms, known as the Plumbers. He is joined by his cousin Kevin and his friend Gwen, who possess superhuman abilities. Together, they form a team known as Highbreed, later renamed as Alien Force.
Lore heavy. Ben learns that Chromastone is actually a Crystalsapien – a guardian of the alien race Petropia. Features a duel with Vilgax and the resurrection of Tetrax's homeworld.
Ben 10: Alien Force is widely considered the "Golden Era" of Ben’s teenage years. While the Highbreed saga offers the best serialized storytelling (War of the Worlds), the show shines brightest when it focuses on the trio's chemistry. Whether you are watching for the lore or the alien fights, these episodes are the cream of the crop.
According to user ratings, these episodes stand as the highest-rated in the series:
Rank: 9.5/10 This is the peak. Every episode advances the High Breed plot or character growth.