A crazed killer escapes from an asylum and assumes the identity of his twin brother, a famous and respected architect.

Donna Mills
as Patty Heron

Ian Hendry
as Terry Spelling / Bob Spelling

David Lodge
as Bradley

Roddy McMillan
as Inspector Fillory

Robin Parkinson
as Mr. Holland

Susan Dury
as Jenny

Christine Shaw
as Woman

Seretta Wilson
as Sara

James Greene
as Policeman

Jonathan Dennis
as Intern