AMC Movies: Great Detective Classics

Ellery Queen in the Mandarin Mystery starring Eddie Quillan (1936, run time 66 minutes)
A crook steals a $50,000 stamp, which results in two murders–both committed in impenetrably locked rooms. Famous detective Ellery Queen sets out to retrieve the stolen goods and solve the murders–but falls in love with the primary suspect.

Sherlock Holmes in the Triumph of Sherlock Holmes starring Arthur Wontner (1935, run time 84 minutes)Holmes and Dr. Watson investigate a mysterious murder at Birlstone Castle. The killing seems to be tied to the Scowlers, a secret society of coal miners. Conspiracy with an American gangster adds to the thrills and chills of skullduggery involving the infamous Professor Moriarty.

Bulldog Drummond in Bulldog Drummong Escapes starring Ray Milland (1937, run time 67 minutes)
This edge-of-your seat action movie is filled with plenty of mystery and espionage. Ray Milland, as Bulldog Drummond, comes to the aid of pretty heiress, Phyllis Clavering (Heather Angel), who is being held against her will by villains. Lots of action and adventure as a scheming "family friend" hopes to get his mitts on her inheritance.

Mr. Moto in Mr Moto’s Last Warning starring Peter Lorre (1937, run time 71 minutes)
Two spies try to sabotage French ships passing through the Suez Canal and plans to blame the British. Detective Mr. Moto is assigned to stop them and finds himself hip deep in international espionage.