Flesh Crawls - S2.E13

DeLeon and Weston are to take the captured Neo mega, Lysander, and a mutating agent back to the planet Chaos for examination. But what they believe to be Lysander is actually a melding of the Neo mega with a Neo sapien receiving experimental treatment for AutoMutation Syndrome. So during the flight back Lysander escapes and wreaks havoc on the Scavenger, killing various pirates, Captain Ryack included. The survivors abandon ship, leaving behind a overloading fusion pack to destroy the ship with the now mutated Neo aboard to be killed.