It's Halloween night and trick-or-treating with the worms gets dangerous when Jay comes across an alien that kidnaps children.

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.

Drekk, an old friend of Frank the Pug, is running loose on Earth. And Frank faces getting boiled alive if he helps Jay and Kay apprehend him.

A sonic powered alien named Aldoosi escapes from Eileen and her new partner, Eidi. To track this fugitive down, Kay works with Eileen and Jay works with Eidi.

Parasites spread by alien seeds take over MIB and threaten the world. As the remaining agents try to stop it, Jay can't keep his mouth shut since he's accidentally been given a truth serum.

Alpha and Dak, Jeeb's brother, take over MIB's Blackguard satellite. Jay and Kay blast into space to stop them before they destroy MIB with it.

The Fmeks are stealing human suits from their enemies, the Arquillians. Jay gets shrunk down to their tiny size to find out what the Fmeks are up to.

The Queen Bug puts out a bounty on the MIB agent that took out dearly departed Edgar. Now Elle is running from some nasty bugs looking to collect the reward.

Preparing to conquer Earth, the Fmeks break into MIB to get their tiny hands on a growth forumla. They mistake one of the worms to be able to make the formula and capture him.

It's up to MIB to save Christmas when Drekk kidnaps Santa Claus.

Jay and Kay head to Hollywood to investigate the disappearances of alien actors.

The Tomassitron Matter Amplifier grants Jay, Kay and Elle super powers as well as three alien criminals, leading to a super showdown.