An accident leaves Peter with a high-pitched voice, and Jesus coaches him into fending off the other choir boys. Stewie is attracted to Lois' new masculine physique.
The death of a professional tennis player leads the task force to a doctor who may be fixing the odds for a major sports betting syndicate. Red digs deeper into Dembe's betrayal. Ressler struggles with sobriety.
A spate of coordinated attacks on Red’s lieutenants puts Dembe in imminent danger, prompting him to relive the events that led him to join the FBI two years earlier.