In this episode we learn that Detective Carella's badge number is 714-5632.
This episode is based upon a short story written by Helen Nielsen.
Leonard Nimoy would go onto play Mr. Spock on Star Trek.
Arte Johnson would go onto become a regular on the NBC variety series Laugh-In.
Carella: Come on, Rog, let's close the deal with Barrow.
Carella: (to Blaney) This wasn't a duck, this was a man.
Meyer: I always get lost kids. Must be my father instinct.
Hotel Clerk: I told you, this isn't the Ritz.
Carella: No kiddin'.
Carella: Why would a salesman go home and get a gun before he showed a car to a customer?
Meyer: Maybe he was a hard sell.