Rex Barker (played by Jack Warden) tells Samantha, "I don't drink anymore. Of course, I don't drink any less, either!" This same line was delivered 31 years later in While You Were Sleeping (1995) by Glynis Johns at the Callaghans' Christmas party while Jack Warden was seated next to her.
First appearance in the series of Darrin's boss, Larry Tate, and his wife, Louise Tate.
The name of the man Samantha turns into a dog (Rex Barker) is a pun. Rex, being a stereotypical name for a dog and Barker being one who barks.
The road map to the Stephens Bedroom is ironed out. UP the stairs, right turn, pass the first door and a shiny star, the room is the last door. As the series goes, where the future "Tabitha" and "Guest" rooms are never mapped out exactly. Their bedroom would be over the living room.