"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie onJune 9, 1941 with Carole Lombard reprising her film role.
"Screen Director's Playhouse" broadcast a 30 minute radio adaptation of the movie on January 30, 1949 with Robert Montgomery reprising his film role.
Carole Lombard was a devoted Democrat, while Robert Montgomery was a Republican. During breaks in filming, Lombard made a point of running into the studio parking lot and putting FDR re-election bumper stickers on Montgomery's car.
Carole Lombard, in order to twit Alfred Hitchcock and generate publicity about his comment that "actors are cattle", set up a miniature cattle pen on the set. The pen held three heifers, each emblazoned with the name of one of the three stars.
Cary Grant was the first choice for the role of David.
This was the first Alfred Hitchcock film to be shown on American network television.
Alfred Hitchcock:
about halfway through the movie passing David Smith in front of his building.
Alfred Hitchcock:
[bathroom]
a conversation is made difficult by a noisy flushing toilet.