The real painter of Columbo's portrait was Jaroslav Gebr. Gebr was born in Pisek, Czechoslovakia and fled the post-war Communist regime, arriving in Hollywood. He began working in the art departments of Fox and MGM and eventually ended up at Universal's Television studios where he led the art department for many years.
The Paradise Cove location where Louise's body is recovered is the same location as Jim Rockford's house trailer in The Rockford Files (1974).
One of the few episodes where Columbo is seen before the murder or the murderer.
Max's painting of Vito's bar resembles Edward Hopper's 'Nighthawks'. Style, theme, composition, and colors are much the same.