Inspector Ralph Brown

Terence Morgan

Robert Isaac Pitt

Andre Morell

Jill Wilson

Yolande Donlan

Inspector Newcombe

Anthony Oliver

Antonia Pitt

Ursula Howells

Harold

Reginald Beckwith

Pietr Revski

Guido Lorraine

Riddle

Basil Dignam

Sir Robert Rosper

Raymond Rollett

Professor Robinson-Heston

Fred Johnson

Karl Kopek

Arnold Marlé

Prison Governor

Mark Dignam

Brown's Co-Driver (uncredited)

John Maxwell

Assistant Commissioner

John Horsley

Soldier (uncredited)

Nigel Sharpe

Pvt. Eric Colter

Barry Lowe

Young Woman

Diana Lambert

Pitt's Maid (uncredited)

Petra Davies

Enders (uncredited)

Cyril Renison

Police Sergeant (uncredited)

Brown Derby

Chertwell Security Guard (uncredited)

Michael Godfrey

Nick (uncredited)

Arthur Lovegrove

Brown's Driver (uncredited)

Guy Mills

Waiter (uncredited)

Louis Matto

Nick's Thug (uncredited)

Jim Brady