In a failed attempt to catch "The Cartwheel Killer," Marvin is eager for a new partner who won't slow him down. Someone sleek and tough, with the mustache befitting its own 80s TV show, Marvin looks for a partner just like him, if not better.

In an attempt to stop Marvin from forgetting about him, Stan and Dr. Pentos create a diabolical plan staging his disappearance.

During the town's talent show, a serial killer targets the winner as Marvin finds himself at the judging table to capture them in the act.

In an attempt to become immortal, Marvin drinks a special potion that causes rapid de-aging. Meanwhile, the department hires a new lieutenant.