Bill Bixby is listed as the director of this episode. Brenda Benet is a guest star. These two were married to each other at the time.
Bill Bixby was the director of this episode. A few episodes later, he was a guest star in The Empty Tower (1975)
To do some surveillance, Mannix at one point parks at the entrance of Pepperdine University in Malibu. The campus' Phillips Theme Tower is visible in the background.
A little over a month after the airing of this episode, Anthony Zerbe would be cast as Lt. K.C. Trench, Harry Orwell's police contact, on a rival private detective show "Harry O", on a rival network (ABC).