
Plot
A young psychiatrist applies for a job at a mental asylum and must pass a test by interviewing four patients. He must figure out which of the patients, is in fact, the doctor that he would be replacing if hired.
Trailer
Cast

Peter Cushing
Smith

Patrick Magee
Dr. Lionel Rutherford

Herbert Lom
Byron

Britt Ekland
Lucy

Barry Morse
Bruno

Charlotte Rampling
Barbara

Barbara Parkins
Bonnie

Robert Powell
Dr. Martin

Sylvia Syms
Ruth

Richard Todd
Walter

James Villiers
George

Geoffrey Bayldon
Max Reynolds

Ann Firbank
Anna

Megs Jenkins
Nurse Higgins

John Franklyn-Robbins
Mr. Stebbins