Peter Falk traveled all the way to Switzerland to persuade Oskar Werner in person to take part in this segment.
Gena Rowlands was the wife of actor/director John Cassavetes, who had been the killer in Étude in Black (1972). Cassavetes and Peter Falk were friends and ultimately worked together on six films.
The football footage is from the Nov. 24, 1973, Wake Forest at North Carolina State game, which NC State won 52-13.
The piano music playing while the murderer is preparing to murder his mother-in-law is Frédéric Chopin's Ballade No. 1 in G minor, Op. 23.
Harold Van Wick's residence is the same filming location as Mark Wharton's residence in Hocus-Pocus (1976) and Dave Erhard's residence in Lady Killer (1976).