Mrs. S orders the sisters to take a night off from sleuthing to celebrate Felix's art opening. But while Felix attempts to impress a famous gallerist with the help of his sestras, Sarah remains on edge with a nagging suspicion that S is hiding something.

Cast: Tatiana Maslany, Jordan Gavaris, Kevin Hanchard, Kristian Bruun, Ari Millen, Josh Vokey, Maria Doyle Kennedy, Evelyne Brochu, Skyler Wexler, James Frain, Kyra Harper, Zoé De Grand Maison, Lauren Hammersley, Andrew Moodie, Elyse Levesque