Fog Island is a 1945 American mystery-suspense film directed by Terry O. Morse. The film stars B movie horror film regulars George Zucco and Lionel Atwill. It was based on the 1937 play Angel Island by Bernadine “Bernie” Angus.

Plot
A recent ex convict named Leo Grainer (so-called in the credits, but in fact referred to as Grainger throughout) lives secluded on Fog Island with the daughter of his murdered wife. Seeking to learn who murdered her, and to exact revenge on those who framed him and destroyed his business, he invites his former associates to his creepy island mansion on the pretext he may share a hidden fortune with them.

Prior to their arrival he rigs the mansion with secret passages and a trap. Then, once his guests arrive, he gives each a clue, including his step daughter and butler. This successfully pits everyone against the others and plays on their greed. What then transpires is conflict, revealed mysteries, sudden death, and an unlikely resolution.

Cast
Lionel Atwill as Alec Ritchfield
George Zucco as Leo Grainer
Jerome Cowan as Kavanaugh
Sharon Douglas as Gail
Veda Ann Borg as Sylvia
John Whitney as Jeff
Jacqueline deWit as Emiline Bronson
Ian Keith as Dr. Lake
George Lloyd as Allerton – Butler