Redressed parts of the set of The Brady Bunch (1969) house are used for Janet Malone's foyer and living room.
This is Jack Ging's last appearance as Lt. Dan Ives.
Parts of the car chase scene are from Trap for a Pigeon (1974). (Coincidentally, in both episodes Mannix borrowed the cars he used in the chase scenes from characters portrayed by actors who had guest starred on episodes of Star Trek (1966): Barry Atwater and Stanley Adams.)