Vincent Price as Sir Julian Markham

Christopher Lee as Dr. J. Neuhartt

Rupert Davies as Joshua Kemp

Uta Levka as Heidi

Sally Geeson as Sally Baxter

Alister Williamson as Sir Edward Markham

Peter Arne as Samuel Trench

Hilary Dwyer as Lady Elizabeth Markham

Maxwell Shaw as Hackett

Carl Rigg as Norton

Harry Baird as N'Galo

Godfrey James as Weller

James Mellor as Holt

John Barrie as Franklin

Ivor Dean as Hawthorne

Danny Daniels as Witchdoctor

Michael Balfour as Ruddock

Hira Talfrey as Martha

John Wentworth as Parson

Betty Woolfe as Mrs. Hopkins

Colin Jeavons as Doctor (uncredited)

Martin Wyldeck as Constable (uncredited)

Barbara Kellerman as Dr. Neuhartt's Patient (uncredited)

Martin Terry as Sailor (uncredited)

Anne Clune as Prostitute (uncredited)

Jackie Noble as Prostitute (uncredited)

Ann Barrass as Prostitute (uncredited)

Jan Rossini as Prostitute (uncredited)

Zeph Gladstone as Trench's Girl (uncredited)

Tara Fernando as Gypsy Dancer (uncredited)

Tony Thawnton as Man in Tavern (uncredited)

Anthony Bailey as Talbot (uncredited)

Richard Cornish as Groom (uncredited)

Andreas Malandrinos as Baron (uncredited)

Hedger Wallace as Major (uncredited)

Bill Cummings as Fighting Man in Tavern (uncredited)

Victor Harrington as Sir Julian (uncredited)

Arthur Howell as Fighting Man in Tavern (uncredited)

Eddie Powell as Fighting Man in Tavern (uncredited)

Nick Tate as Young Man in Tavern (uncredited)

Reg Thomason as Drunk (uncredited)

Harold Coyne as Barman (uncredited)

Ina Clare as Tavern Reveller (uncredited)

Sean Barry-Weske as Molester in Tavern (uncredited)