Mike suspects that Toni is cheating on him with her boss; Frank heads to the track with Tommy to place bets using police department money; Jan and Ruben both vie for a gorgeous apartment left vacant by a murder.

Mike promises Karen that he'll quit drinking, just to prove he really doesn't have a problem; the squad has second thoughts about busting a pot party; Mike discovers the joys of abusing cold medicine.

Toni blackmails Mike into meeting her parents; Jan dates a cop with a secret; Tommy courts a rageaholic.