- Unknown:
- George Zucco
- Unknown:
- David Bruce
- Unknown:
- Evelyn Ankers
- Unknown:
- George Zucco
- Play By:
- Hans Krally
- Directed By:
- James Hogan
- Unknown:
- Peter Cushing
- Unknown:
- Christopher Lee
- Unknown:
- Max Adrian
- Unknown:
- Michael Gough
- Unknown:
- Donald Sutherland
- Unknown:
- Milton Subotsky
- Produced By:
- Milton Subotsky
- Produced By:
- Max J. Rosenberg
- Directed By:
- Freddie Francis.
- Ted Allison:
- David Bruce
- Isabel Lewis:
- Evelyn Ankers
- Dr Alfred Morris:
- George Zucco
- Ken McClure:
- Robert Armstrong
- Eric Iyerson:
- Turhan Bey
- Macklin:
- Milburn Stone
- Eagan:
- Andrew Tombes
- Delia:
- Rose Hobart
- Gavigan:
- Addison Richards
- Garrity:
- Charles McGraw
- Dr Schreck:
- Peter Cushing
- Franklyn Marsh:
- Christopher Lee
- Biff Bailey:
- Roy Castle
- Bob Carroll:
- Donald Sutherland
- Jim Dawson:
- Neil McCallum
- Bill Rogers:
- Alan Freeman
- Dr Blake:
- Max Adrian
- Tod:
- Edward Underdown
- Deirdre:
- Ursula Howells
- Caleb:
- Peter Madden
- Valda:
- Katy Wild
- Ann Rogers:
- Ann Bell
- Carol Rogers:
- Sarah Nicholls
- Hopkins:
- Bernard Lee
- Drake:
- Jeremy Kemp
- Sammy Colin:
- Kenny Lynch
- Shine (compère):
- Harold Lang
- Vrim:
- Christopher Carlos
- Pony and trap driver:
- George Mossman
- Dambala:
- Thomas Baptiste
- Bailey's band:
- Tubby Hayes Quintet
- Steel band:
- Russ Henderson
- Eric Landor:
- Michael Gough
- Pretty girl:
- Isla Blair
- Surgeon:
- Hedger Wallace
- Nurse:
- Judy Cornwell
- Lady in art gallery:
- Faith Kent
- Male friend:
- Brian Hankins
- Second male friend:
- John Martin
- Third male friend:
- Kenneth Kove
- Toastmaster:
- Frank Forsyth
- NicOlle:
- Jennifer Jayne
- Detective:
- Al Mulock