Valentine's Day

Brodie suggests that a classmate of his named Schack should be a suspect in the death of the student that Munch believes committed suicide. Frank and Mary meet with their marriage counselor and they begin to air some issues. Bayliss and Kellerman try to link together two deadly bombings. Schack attacks Brodie, but he can't prove it. He does offer a way to get Schack to admit to the murder. Frank tells Mary that he will agree to getting Olivia baptized. Mike connects the two bombings; the victims were both connected through the death of the Korean grocer who was murdered by a man who worked for Luther Mahoney. They suspect that there may be more bombs, including one at the courthouse where Meldrick and Julianna are waiting to meet with Judge Aandahl and Danvers, both of who were associated with the Korean grocer case. Frank arrives late to the baptism; Mary takes this as a sign and tells him she is leaving him for a while.

Brodie pense qu'un étudiant que Munch croit suicidé, a en fait été assassiné par un certain Alan Shack ; ce dernier tente de la tuer avant d'avouer le crime. Bayliss et Kellerman cherchent le lien entre deux attentats à la bombe : ils le trouveront dans la mort de l'épicier coréen tué par un des hommes de main de Luther Mahoney. Une troisième bombe est posée au palais de justice où Lewis et Cox doivent retrouver Danvers... Pendant ce temps, Pembleton accepte devant Mary et le psy de baptiser Olivia, mais il arrive en retard au baptême et Mary décide de quitter son mari provisoirement