Cheers - Season 5 Episode 15 Spellbound

Diane and Carla console Loretta, who has caught Nick cheating on her. They counsel her to stand on her own two feet and leave Nick. When Nick comes into the bar to claim her back, a chivalrous Sam stands up for her. Nick takes that as a sign that Sam has stolen Loretta from him. So Nick threatens to steal the same from Sam, that being Diane. Nick makes an attempt to wine and dine Diane, then Loretta, then Carla and then any of the three who will give him the time of day. Meanwhile, Frasier, the chess expert, has met his match in simpleton Woody.