The correct pronunciation of the Polish name Szymczyk is neither Zim-zik (as claimed by the character played by E.J. Peaker) nor Sim-zik (as claimed by the character Julian Krubm), but Shim-chik.
Alan Bergmann (the doctor attending Rockford) mispronounces "gurney" as "journey".
The sound of the starter on the Buick Riviera loaner car Rockford was driving was that of a Mopar Chrysler starter.
The Springfield York Insurance Company's logo - seem on the envelope, is the same logo used by Intertect, in Mannix (1967).
At the very end Louise Hartman says goodbye to police Sgt. Tom Garvey, who has that rank in the two shows he is in, but she calls him Lieutenant.