Detective Terry Seattle (Will Arnett) is back and this time, the case is critical. Along with his two celebrity guest stars, Jason Bateman and Maya Rudolph, he is on a mission to figure out... who killed Santa? But here's the catch: Jason Bateman and Maya Rudolph aren't being given the script. They have no idea what's about to happen to them. Together, with Terry Seattle (and many surprises), they will have to improvise their way through the case... but it will be up to both of them to name the killer.

After a big break in a cold case, the investigation heats up for Terry and Ken Jeong, as they resort to truly desperate measures to catch a killer.

After a doctor flatlines at the hospital, Terry and Sharon Stone tackle a medical murder mystery where they must question staff and sew up loose ends.

When a chief health inspector is found dead by poisoning, Terry and Annie Murphy get their hands dirty as they look for leads in a menu of suspects.

Working the night shift, Terry is paired with detective-in-training Kumail Nanjiani and heads back to high school to investigate a tech CEO's death.

As Terry mourns his late great-aunt, he finds support in trainee Marshawn Lynch, who helps him scope out suspects after a wealthy woman is killed.

Terry begrudgingly welcomes Conan O'Brien to the force and works a magic show murder case involving a rival, a former assistant and a moms' association.