At Capt. Holt's birthday party, Jake, Amy and the other officers try to make a good impression on Holt's husband but fail miserably.

Holt and Jake search for a mole in the precinct, and Terry and Rosa visit a silent disco to find "Giggle Pig" dealers.

Jake and Charles go on a stakeout that lasts way too long, and Terry writes a book for his daughters that angers Amy and Gina.

Jake is determined to prove that he's not to blame for Holt's bad mood, and when Charles catches a notorious bank robber, nobody believes him.

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.

Terry forces Jake to take time off after he's injured chasing a perp, and Holt and Rosa go on an awkward double date with their significant others.

Tensions flare as Jake and Rosa work a case with two peculiar Swedish cops. Neil deGrasse Tyson drops by to help Gina prepare for a big test.

When famous author DC Parlov receives death threats, Jake and Terry take the case, so that Terry can meet his lifelong hero. Back at the precinct, Gina forces her way into the Boyle clan of cousins in an attempt to choose the location of the annual Boyle family vacation. Meanwhile, Holt's anger peaks when Amy chooses Kevin's side in their argument about a math puzzle.

On Thanksgiving, alcohol provides a temporary fix to Jake and Amy's parental problems, and a pilfered pie awakens the ruthless interrogator in Holt.

After a threat from Murphy, Holt stashes husband Kevin in a safe house with Jake. Rosa goes undercover at a salon. Scully reveals an actual skill.

While celebrating their first anniversary, Jake and Amy realize they've had a communication breakdown over a major life decision.

A burglary investigation at Kevin's university reveals Holt's hidden insecurity. Amy and Terry's efforts to raise morale turn deliciously cutthroat.

Mayhem and double-crossing overtake the squad as they try to distract Terry from his lieutenant's exam by kicking off the Halloween Heist on a new day.

Holt turns to Jake for help after a family member goes missing. Rosa battles Amy's ex for a coveted prize. Boyle and Terry team up on a business scheme.

The squad takes up Holt on an offer for a weekend getaway.

Jake and Amy create a system to balance work and childcare and Rosa gets a new houseguest.

Jake and Terry accompany Charles to the funeral of his Great Uncle Pappy — and uncover a family secret. Rosa nudges Holt back into the dating pool.

Amid planning for a vow renewal ceremony, Holt makes a big announcement — one that he asks Jake not to share with Amy. Plus, Cheddar wears a bow tie!