Warning: Contains SPOILERS for The Irrational season 2, episode 17.The Irrational season 2, episode 17, aired Tuesday, March 18 at 10 p.m. ET on NBC. “Suddenly Alec” is the final installment before the season finale, and sees the behavioral science professor take on an unexpected role in a local musical. The official synopsis reads: “In order to solve an actor’s murder, Alec and Rose must go undercover to infiltrate a community theater production of Little Shop of Horrors but joining the cast may put them right in the killer’s crosshairs.”