Bulldog Drummond's Secret Police (1939), produced by Stuart Walker, is part of the long-running British-American film series based on the adventures of the fictional detective and adventurer Captain Hugh “Bulldog” Drummond. In this installment, Drummond prepares for his wedding when a mysterious visitor arrives with a cryptic message and is soon found murdered. Drummond and his loyal companions are drawn into a deadly search for a hidden fortune buried in the ancestral halls of Temple Tower, all while being pursued by a sinister enemy. With secret passages, coded clues, and shadowy villains, the film blends detective intrigue with gothic atmosphere. A fast-paced and entertaining mystery, it captures the charm and wit that made the Bulldog Drummond series a staple of pre-war detective cinema.