Harry Da Souza has to make a problem vanish after a night out goes awry for the sons of two warring crime families.

Harry deals with the aftermath of the Harrigan family meeting as Jan wonders what's the final straw.

As Kevin prepares for all-out war, Harry kills two birds with one stone.

Harry pays a visit to Antoine at the urging of Bella. Fisk and Mukasa trade theories.

Kevin and Harry assess scenarios in a search for insurance and an exit strategy.

In the aftermath of Plan B, Conrad twists the knife and Fisk has a realization: this is war. Maeve gives Eddie a lesson in the art of chess. Richie takes the bait. Harry goes searching for Seraphina and Brendan, who've gone rogue.

Maeve extends an olive branch. Kevin questions the wisdom of a sit down with Jaime. Tattersall offers Fisk and Mukasa a new point of entry. Harry comes to Kat for a favor as Richie, at the Sinful Monkey, contemplates a new affiliation.

Bella does a runner to London. Tattersall gets Alice's tootsies tapping. Kevin confronts his past. The Harrigans sit down for a normal family dinner.

Kevin takes care of a problem. Tattersall delivers on a promise as Richie prepares for war. Seraphina, reading the room, agrees to a meet and greet. Maeve spills the tea. Jan gets Harry's attention. Season finale.