The appearance of Roy's ex-wife Sylvia on Nantucket surprises the gang as much as it delights Roy. Roy hopes for a reconciliation, but after a phone call comes into AeroMass saying that she was only doing it to get even with her cheating ex-husband, Brian reluctantly tells Roy. Roy refuses to believe him at first, but eventually skips out on sleeping with his ex. Meanwhile, Helen tries to fend off a smitten and slightly crazy waiter from the crab house.