Branded as criminally insane and incarcerated for a murder he did not commit, Speight escapes from the asylum, determined to clear his name. He befriends private detective Hugo Bishop who, convinced that the wrong man has been convicted, agrees to help find the real killer. They begin their search for the murderer closest to home where both Thelma Speight and her employer Maurice Jerrard were visibly distressed by the news of her husband's jailbreak. More than Speight's 'insanity' fuels their worries.
Paul Henreid
as Hugo Bishop
Lois Maxwell
as Thelma Speight / Tasman
Kieron Moore
as Mervyn Speight
Hugh Sinclair
as Maurice Jerrard
Lloyd Lamble
as Inspector "Freddie" Frisnay
Anthony Forwood
as Rex
Bill Travers
as Victor Tasman
Mary Laura Wood
as Susie Martin
Kay Kendall
as Vera Corridge
Anna Turner
as Marjorie
