Things for Season 3 of "Brooklyn Nine-Nine" are about to go from comedy to morbid (sort of) when Jake (Andy Samberg) gets started on the case of serial killer.

Episode 4 is titled "The Oolong Slayer" and will air on broadcast network Fox next Sunday, Oct. 18 at 8:30 p.m. EDT, according to TV Guide.

Although Jake was busy with fixing up a doomed love affair in the last episode, he will now have to take his job just a little more seriously when he gets on the case of a possible serial killer.

According to Spoilers Guide, Jake get mixed up in the case and for reasons unknown, he needs to take his investigation of the serial killer off the radar. That means off the radar from the public as well as the precinct. So what does he do to ensure that happens? Well, of course he goes to his old friend and new PR man (former) Captain Holt (Andre Braugher).

But that has to make someone wonder, just how can Holt help him stay off the grid given he is no longer the Captain, but a major PR man for the NYPD? Well, his skills in his new role will definitely be of some assistance, but he will also have to get back into the game a little more than his job allows, which he will have no problem doing. As a matter of fact, fans will find that Holt is quite up to the challenge.

So in other news for the episode, Terry gets stuck with a new obsession that brings all the comedy to the very forefront of the episode.

Rosa and Amy are also forced to deal with an old adversary, which with those two together, fans know they will make a mockery of the poor character.

Take a look at the preview for next week's episode below.