Colonel Barclay is found dead and his wife is arrested for the murder, but Holmes is convinced a missing door key will reveal the true killer.
Eille Norwood
as Sherlock Holmes
Hubert Willis
as Dr. John Watson
Jack Hobbs
as Henry Wood
Gladys Jennings
as Mrs. Barclay
Dora De Winton
as Miss Morrison
Richard Lindsay
as Major Murphy
