Ben 10 (Classic), Season 4

Before their summer road trip is done, Ben, Gwen, and Max still have plenty of alien adventures on the itinerary. In Season 4, Ben discovers even more alien heroes to add to his arsenal. And it's a good thing, because some of Ben's biggest enemies are back with a vengeance, and Team Tennyson will need all the help they can get to save the world — and even the universe — from the likes of Vilgax, Animo, and the Forever Knights.