The Return of Dr. X (1939) A First National Picture :: Warner Bros. / EP: Jack L. Warner, Hal B. Wallis / AP: Bryan Foy / D: Vincent Sherman / W: Lee Katz, William J. Makin / C: Sidney Hickox / E: Thomas Pratt / M: Bernhard Kaun / S: Humphrey Bogart, Rosemary Lane, Wayne Morris, Dennis Morgan, Huntz Hall