According to her car registration, Karen Lewis lives at 1040 No. Las Palmas. In the series, two other characters, per their registrations, live at the same address: David Lambert in The Case of the Crying Cherub (1960) and Fred S. Swan in The Case of the Barefaced Witness (1961). 1040 N. Las Palmas was the street address for General Service Studios, where some of the filming of the series occurred.
This is the first episode where Perry and Paul are wearing the narrower ties that became fashionable in the early 1960s.
Patricia Breslin married Cleveland Browns owner Art Modell in 1969. Modell would eventually move the Cleveland Browns to Baltimore in 1996. Today those Browns are known as the Baltimore Ravens. Mrs. Modell was a philanthropist in her later life.