Ep 6. The Frogs of War, Pt.1

Ben 10: Omniverse season 3 episode 6, "The Frogs of War, Pt.1," sees Ben teaming up with Rook to fight off an alien invasion. The episode begins with Ben and Rook traveling to Undertown to investigate a break-in at Mr. Baumann's store. They discover that the culprit is Princess Attea of the Incursean Empire, who has come to Earth to enlist Ben's help in fighting a war against her father.

Attea explains that her father has become obsessed with conquering other planets and is now planning to invade Earth. She tells Ben that she needs his help to stop him, but Ben is skeptical. He knows that Attea is not to be trusted, and he worries that she might be using him for her own purposes.

Despite Ben's reservations, he agrees to help Attea and travels with her to the Incursean homeworld. Once there, Ben and Attea discover that Attea's father has already launched an invasion against Earth. They also discover that the Incurseans have developed a new weapon that could turn the tide of the war in their favor.

Ben and Attea realize that they need to find a way to stop the Incursean invasion before it's too late. They hatch a plan to steal the Incurseans' new weapon, but their mission is complicated by the fact that Attea's father has hired the bounty hunter Khyber to capture Ben.

As Ben and Attea make their way through the Incursean stronghold, they encounter a resistance movement led by an Incursean mutant named Bullfrag. Bullfrag agrees to help Ben and Attea in their mission, but his loyalties are uncertain.

As the episode ends, Ben and Attea manage to steal the Incurseans' new weapon, but they find themselves trapped by Khyber and his pet alien, Zed. The stage is set for an explosive confrontation in part two of "The Frogs of War."