Review: Captain Holt is lonely! When the gang discovers that Captain Holt is lonely due to Kevin’s Parisian sabbatical, Jake decides to help him out by distracting him with the investigation of a cold case. When working the case, involving the disappearance of an Italian mafia lieutenant, they both contract the mumps and they’re quarantined together for nine days. Luckily for them, Amy keeps up with her vaccinations so much that she’s vaccinated for “things you’ve never even heard of” and can therefore check in on the men.
Jake and Captain Holt work the case, slowly succumbing to the various symptoms of the mumps (including severe testicular discomfort!) and getting more delirious by the day. Amy convinces/threatens Jake to tell Captain Holt the truth about why he wanted to work the case and this ends up in a mumps-poking (seriously!) battle when Holt finds out Jake lied to him.
Eventually, Amy makes the men spaghetti based on a recipe related to the case, but they soon discover (because Amy’s spaghetti is “revolting”) that it’s actually the key to solving the case!
Back at the precinct, this week’s B-plot involves the loss of Charles’s dog, Jason, known for humping everything in sight (this got Boyle through his divorce!). Charles is in mourning, unable to help Rosa with her investigation. Rosa tries to help Charles get over the loss of his dog, even getting him a new puppy, but it’s only after Boyle refuses the puppy and she’s forced to take care of it herself, that she gets why Charles is heartbroken. She gets everyone together and organizes a funeral, so Charles can finally say goodbye to his beloved dog.
Finally, because of Captain Holt’s medical leave, Terry is left in charge of the precinct, coinciding with his upcoming captain’s exam. Terry tries to get stuff done and be proactive (with a long list of tasks and a victory bell!), but as it turns out, being captain is not as easy as it looks. In the end, Gina makes Terry realize that being a captain is all about “putting out fires all day” and being there for the precinct, and that he’ll do a fine job.