Now on his own, Ben sets out to be a solo superhero, with new alien heroes at his disposal, but Grandpa Max has other plans. (Introducing Rook, Malware, Khyber, Nemetrix alien Crabdozer, new Ben aliens Feedback & Blox, Pakmar)

Ben and Rook discover an underground city beneath Bellwood populated with aliens! But who is terrorizing them? (Introducing Nemetrix alien BugLizard, & Ben alien Shocksquatch, Psyphon, Fistina, Bubblehelmet, Liam)

Alien pests from Ben's youth come back, but now they need Ben's help. (Introducing Fistrick, & new Ben alien Gravattack)

Flashback episode: Young Ben, Gwen, and Grandpa Max visit Azmuth on Galvan Prime. There, they have their first encounter with Malware, a corrupted Mechamorph who's determined to make Azmuth cure him, by any means!

Ben and Rook must stop a giant rampaging alien from destroying Bellwood while dealing with a peace-loving alien-rights activist who doesn't want it hurt. (Introducing Hokestar, Solid Plugg 1st appearance, Pax, Sunder)

Dr. Animo has escaped his Plumber prison, and Ben and Rook must track him down before he turns the world into his personal mutant ant farm! (Introducing Nemetrix alien Slamworm, Galvan Plumbers Blukic and Driba, Arctiguana, new Ben alien Crashhopper)