Investigating the theft of a Sintillian heart, Kay learns the culprit is Alpha, his former mentor and the man who left him for dead years ago. But Jay and Kay discover Alpha now has multiple body parts grafted onto his body, becoming even more dangerous.

Jay gets Elle to make him a set of quick clones so he can catch up on some much needed sleep. But while Jay snoozes, Alpha resurfaces and uses one of the quick clones to capture Zed.

Alpha is back and his alien attachments are falling apart. At first, he forces Jeebs to locate new alien body parts for him. But when Alpha discovers Troy the symbiote is at MIB, his plans change.