Back With a Vengeance (S02E13)

The Megacruiser drifts through space while Kevin investigates a massive ice block he discovered. To his surprise, he finds Vilgax trapped inside, very much alive. Realizing they share a common goal, the two form an unlikely alliance. Meanwhile, on Earth, Ben tinkers with the Omnitrix, searching for a better way to manage its powers. He eventually unlocks the master control, allowing him to switch between alien forms at will and extend the time he can remain transformed. While this newfound ability boosts his strength, he wonders if it will be sufficient to confront the looming threat.