Halloween-hating Amy is anything but festive when she has to don a costume and hit the streets with Charles on busy Halloween night.

When Jake discovers that a mobster escaped his otherwise successful sting, he enlists Charles to help track him down, which worries Gina.

It's wedding day for Charles and Gina's parents, and everyone in the squad is given duties; but Jake and Gina get distracted, and Terry has troubles.

Jake and Amy go undercover to catch an infamous identity thief, and the squad is rocked by an unexpected farewell.

A lovers' spat leads to trouble on the job as Jake and Amy chase down a new street drug. A parking mishap drives a wedge between Holt and Boyle.

An illness leaves Jake and Holt quarantined and delusional as they try to solve a cold case. Terry discovers running the precinct is messy work.

Captain "CJ" is having major problems with a big case, and Jake and Holt find the motivation to help him out. Inside the precinct, war ensues when Terry enforces a green initiative and tells Gina to get rid of her precious space heater, while Rosa and Boyle take a break from the night shift to visit a foot massage parlor.