Leo, a former convict, is living in seclusion on an island with his step-daughter, the daughter of his late wife. Leo was framed by a group of former business associates, and he also suspects that one of them killed his wife. He has invited the group to his island, tempting them by hinting about a hidden fortune, and he has installed a number of traps and secret passages in his home. He is aided in his efforts by a former cell-mate who holds a grudge against the same persons. When everyone arrives, the atmosphere of mutual suspicion and the thick fog that covers the island promise a tense and hazardous weekend for everyone.

George Zucco
as Leo Grainger

Lionel Atwill
as Alec Ritchfield

Jerome Cowan
as John Kavanaugh

Veda Ann Borg
as Sylvia Jordan

Sharon Douglas
as Gail

John Whitney
as Jeff Kingsley

Jacqueline deWit
as Emiline Bronson (as Jacqueline DeWit)

Ian Keith
as Dr. Lake

George Lloyd
as Allerton, Butler
CinemaSerf
This is a very well staged murder mystery; the timings of movement throughout the fog-bound house riddled with secret passages are as precise as a ballet; and that helps keep the pace of it flowing along quite well. It needs to be, the dialogue is really quite poor and overall it's a waste of the ta...