Bosley mentions a wife in this episode, when he tells Jill that his wife packed brown shoes to wear with his black tux. Not only is his wife never mentioned again, but he goes on to woo several different women throughout the course of the series and even says in one episode when asked if he's married, "Uh.. not lately."
In the cocktail party scene, standing right behind Robert Loggia is Shirley Anthony as a party guest. She later worked with Kate Jackson again when she played Mrs. Marston on Scarecrow and Mrs. King (1983).