''Bulldog Drummond's Secret Police is a 1939 English Castle murder mystery film directed by James P. Hogan, based on the H. C. McNeile novel Temple Tower. It is one of many films featuring the British sleuth and adventurer Bulldog Drummond. In 1930, Fox produced Temple Tower, directed by Donald Gallaher and starring Kenneth MacKenna and Marceline Day, which was also based on the McNeile book.

Plot

An absent-minded Professor Downie (Forrester Harvey) makes a call upon Capt. Hugh "Bulldog" Drummond (John Howard) as he is making plans for his much-delayed wedding to fiancée Phyllis Claverling (Heather Angel) in his ancestral home Temple Tower.