Special billing was given to Jerry Stiller (Special Guest Star) in this episode.
Mrs. Mitchell: I haven't had this kind of excitement since Barnaby Jones went off the air.
This is a reference to the TV series Barnaby Jones (1973-80) which starred Buddy Ebsen as a private investigator who came out of retirement to catch his son's killer. He decided to continue working with the help of his daughter-in-law and later a cousin portrayed by Lee Meriwether and Mark Shera.
Rick Simon: Who are you, Jack Webb?
When Campbell (John Schuck, formerly of McMillan and Wife) asks Rick for ID as Rick is pretending to be a civil servant measuring his office, Rick responds by asking him if he is Jack Webb. Webb is one of the most well-known TV icons of the 1950s, and played Joe Friday in the original Dragnet.