Culver is a psychiatrist who uses hypnotism to treat his patients. When Carpenter, a test pilot, comes to see him complaining of blackouts that make his job difficult, Culver tries to mesmerise him into killing his wife.

Paul Carpenter
as Val Neal

Patricia Roc
as Mary Foster

Roland Culver
as Dr. Francis Pelham

William Hartnell
as Inspector Ross

Gordon Boyd
as Detective Sergeant Davis

Edgar Driver
as Atkins

Tom Tann
as Wang

Ellen Pollock
as Miss Barbara Barton

Robert Sansom
as Senior Test Flight Official

Martin Wyldeck
as Dr. Bradford