The still of Peter Lupus (Willy) used in this season's credits is taken from the "apartment scene" in this episode.
The street scene at about 43 minutes in appears to be the same location used in Star Trek "A Piece of the Action"
The scene where the ambulance is on its way to the hospital and the Safeway sign is visible was also used other times and in Mannix as well.
This episode was filmed shortly before Billy Dee Williams's breakout role in the TV-movie "Brian's Song (1971)". This episode was aired just 5 weeks before the premiere of the movie.
Frank Kearney's favorite dish is New York steak (rare), baked potato, onion rings and garlic toast.