Peter Cushing as Harry Fordyce

André Morell as Colonel Gore Hepburn (as Andre Morell)

Richard Vernon as Pearson

Norman Bird as Arthur Sanderson

Kevin Stoney as Detective Inspector Mason

Barry Lowe as Peter Harvill

Edith Sharpe as Miss Pringle

Lois Daine as Sally

Alan Haywood as Kane

Jimmy Cains as Sidewalk Santa Claus (uncredited)

Vera Cook as Mary Fordyce (voice) (uncredited)

Charles Morgan as Det. Sgt. Collins (uncredited)

Paddy Smith as Bank Customer (uncredited)

Fred Stone as Window Cleaner (uncredited)

Gareth Tandy as Tommy Fordyce (voice) (uncredited)

Graham Tonbridge as Bank Customer (uncredited)