A doctor treats a woman suffering from multiple personality disorder.
Joanne Woodward
as Eve White / Eve Black / Jane
David Wayne
as Ralph White
Lee J. Cobb
as Doctor Curtis Luther
Edwin Jerome
as Doctor Francis Day
Alena Murray
as Secretary
Nancy Kulp
as Mrs. Black
Douglas Spencer
as Mr. Black
Terry Ann Ross
as Bonnie White
Ken Scott
as Earl
Mimi Gibson
as Eve (as a child)
Alistair Cooke
as Himself (prologue narrator)
Mary Field
as Effie, sales clerk
