Trivia: The bystanders looking at the camera when Rosemary crosses the street were staring in disbelief as Mia Farrow actually wandered out into oncoming traffic! Polanski did not want to "stage" the scene, so she was literally risking her life.
Trivia: The first choice for actors to play Colombo was Bing Crosby.
Trivia: This film is a notable first in the "Pink Panther" series for three reasons. It was the first film not to feature Peter Sellers in the title role, the first not directed by Blake Edwards, and the first in which Henry Mancini did not provide the music score. All three were unavailable as they were involved with the film The Party (1968).