Continuity mistake: When Doug and Carrie are in the living room talking about Doug not going out with Kelly again, he has the phone in his hand, gets upset and throws the phone down. Then Carrie is going to call Kelly for Doug, and when she goes to pick up the phone, it's placed perfectly back on the hook when it should be hanging near the floor from the way Doug threw it.
The King of Queens (1998)
1 mistake in Four Play
Starring: Kevin James, Jerry Stiller, Leah Remini, Victor Williams
Genres: Comedy
Doug Heffernan: OK, I read somewhere that penguins are scared of walruses... So get down there and act like a walrus.
Deacon Palmer: OK so the two of us are up for the role of walrus, and I get it?
Trivia: The house that Doug visits to make a delivery and stays for a while is the same one that is used for the Heffermans' neighbours' house.
Question: Has Carrie's sister, Sara, ever been mentioned again after the first few episodes, and why was she taken off?
Answer: Sara hasn't been mentioned in later episodes, and it suggested in later episodes that she never existed, and that Carrie is an only child. Kevin James stated that the producers couldn't think of an good plots to use with Sara, so they left her out.