Author Erle Stanley Garner objected so vehemently to what he felt was the miscasting of Ricardo Cortez as Mason, that Warners replaced him with Donald Woods.
Unlike in the TV series, in which District Attorney Burger's last name was pronounced as in "hamburger," here it rhymes with "merger."
The last name of District Attorney Hamilton Burger, played by Charles C. Wilson, is pronounced with a soft G as opposed to the hard G that was used during the long-running TV series.
Craig Reynolds, who plays the supporting role of Gordon Bixler, was in two previous entries in the series as totally different characters: Frank Patton in "The Case of the Lucky legs" and Frank Oafley in "The Case of the Black Cat."
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)