MGM executive E.J. Mannix chastised cinematographer James Wong Howe for filming Myrna Loy with mussy hair when she awakens at John Qualen's house, since MGM spent millions glamorizing their star. The scene is in the Turner library print.
Originally planned as another William Powell and Myrna Loy pairing, but Powell was unavailable.
According to studio records, this film did very well at the box office and earned MGM a profit of $404,000 ($7.1M in 2016).
One of three feature films starring Myrna Loy and Spencer Tracy. The others are Libeled Lady (1936) and Test Pilot (1938).
In Season 2, Episode 2 of Sanford and Son (1972), entitled "Whiplash", Fred references Whipsaw and reenacts a brief scene.