Bulldog Drummond's Secret Police is a 1939 murder mystery film directed by James P. Hogan, based on the H. C. McNeile novel Temple Tower.

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.

[1] The story is set 28 miles outside London in Rockingham, as a sign on the railroad station states.

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.

The professor informs Drummond that a fortune was buried in one of the walled off storerooms underneath his estate, and that Downie was in possession of a book written in code that would lead them to discover the treasure.