Jake and Frank learn from Link that Liz and Lucy-Belle has been kidnapped by Olympus, who wants the power of Jake's collar. Jake wants to help save them, blaming himself for getting them involved in the first place. Frank wont have any of that and tells Jack he's got to go launch his ship while he still has a chance to get back home. Frank and Link then watch as the ship goes, only to discover Jake stowed away in there truck. Willingly staying on earth if it means helping his new human friends. The fact that Jake just brushes off Franks shock so they can focus on the rescue just goes to show how good a friend the alien feline is.
Jake: Okay you clowns, let's move it. Let's go!
Link: (happy) Jake!
Frank: J-J-Jake! This is insane! Y-You're here forever! On Earth!