cast
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Donald Pleasence
Dr. Hawley Harvey Crippen
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Coral Browne
Belle Crippen
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Samantha Eggar
Ethel Le Neve
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Donald Wolfit
R.D. Muir (as Sir Donald Wolfit)
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James Robertson Justice
Captain McKenzie
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Geoffrey Toone
Mr. Tobin
- Douglas Bradley-Smith Dr. Pepper
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Olga Lindo
Mrs. Clara Arditti
- Elspeth March Mrs. Jackson
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Paul Carpenter
Bruce Martin
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John Arnatt
Chief Inspector Dew
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Oliver Johnston
Lord Chief Justice
- John Lee Harry
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Edward Underdown
The Governor
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Hamilton Dyce
Dr. Rogers
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Basil Henson
Mr. Arditti
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Totti Truman Taylor
Miss Curnow
- Edward Cast Harding
- Colin Rix Chemist
- Terence Brook Police Sergeant Outside Courtroom (uncredited)
- Eric Dodson Defence QC Clerk (uncredited)
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Max Faulkner
Radio Officer Andrews (uncredited)
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Guy Standeven
Ships Steward (uncredited)
- John Tatham Courtroom Spectator (uncredited)