Trivia

Future star Carole Landis appears as an extra in one of the early scenes. She can be seen bumping into Patric Knowles when he is walking down the stairs.

Warner Bros. created the advertising marketing ploy "Clue Club" to increase audiences attending its crime mystery/drama movies. Twelve titles showing the Warner Bros. "Clue Club" promo footage were released from 1935 to 1938.

Clue Club #1: The White Cockatoo (1935)

Clue Club #2: While the Patient Slept (1935)

Clue Club #3: The Florentine Dagger (1935)

Clue Club #4: The Case of the Curious Bride (1935)

Clue Club #5: The Case of the Lucky Legs (1935)

Clue Club #6: The Murder of Dr. Harrigan (1936)

Clue Club #7: Murder by an Aristocrat (1936)

Clue Club #8: The Case of the Velvet Claws (1936)

Clue Club #9: The Case of the Black Cat (1936)

Clue Club #10: The Case of the Stuttering Bishop (1937)

Clue Club #11: The Patient in Room 18 (1938)

Clue Club #12: Mystery House (1938)

The $100,000 for the radium would equate to $1.78M in 2019. At that price, at that time, the amount of radium in question would weigh only about one gram.

Several performers listed in studio records were not seen in this film, listed here with their character names: Allan Conrad (Night Clerk), William Hopper (Grabshot), Owen King (Day Clerk), Julius Molnar (Newsboy), Spec O'Donnell (Elevator Operator), Dick Paxton (Newsboy), and Cliff Saum (Policeman).

Jean Benedict's debut.