Wealthy writer Stephen Byrne tries to seduce the family maid, but when she resists, he kills her. Long jealous of his brother John, Stephen does his best to pin the blame for the murder on his sibling. Also affected by Stephen's arrogant dementia is his long-suffering wife Marjorie.

Louis Hayward
as Stephen Byrne

Jane Wyatt
as Marjorie Byrne

Lee Bowman
as John Byrne

Dorothy Patrick
as Emily Gaunt

Ann Shoemaker
as Mrs. Ambrose - Stephen's houseeper

Jody Gilbert
as Flora Bantam - John's housekeeper

Sarah Padden
as Mrs. Beach - Stephen's elderly cook

Peter Brocco
as Harry - coroner chairing inquest

Howland Chamberlain
as D.A.-prosecutor at inquest

Leslie Kimmell
as Mr. Gaunt