
A British scientist is discovered to have been passing information to the Communists, then kills himself. Another scientist decides that they might have brainwashed him by a sensory deprivation technique, but he doesn’t know if someone really can be convinced to act against their strongest feelings. So he agrees to be the subject in an experiment in which others will try to make him stop loving his wife.

Dirk Bogarde
Dr. Henry Laidlaw Longman

Mary Ure
Oonagh Longman

John Clements
Major Hall

Michael Bryant
Dr. Danny Tate

Wendy Craig
Annabella

Harold Goldblatt
Professor Sharpey

Geoffrey Keen
Calder
Terry Palmer
Norman

Norman Bird
Aubrey

Terence Alexander
Rowing Coach (uncredited)

Grace Arnold
Train Passenger (uncredited)
Timothy Beaton
Paul Longman (uncredited)

Champion
Champion

Fury in Marrakesh
Fury in Marrakesh

The Last Picture Show
The Last Picture Show

Ace in the Hole
Ace in the Hole

A Place in the Sun
A Place in the Sun

Submerged Reef
Submerged Reef

The Whistle Blower
The Whistle Blower

The Masked Man with Two Guns
The Masked Man with Two Guns

Underground
Underground

Bullet Ballet
Bullet Ballet

Pickup on South Street
Pickup on South Street

Khataf Merati
Khataf Merati