Roy Dotrice (Simon Carne), Barbara Murray (The Duchess of Wiltshire), Peter Cellier (Duke of Wiltshire), John Standing (Lord Amberley), Felicity Gibson (Lady Amberley), John Nettleton (Belton), Paul Whitsun-Jones (Marquis of Orpington), Dudley Foster (Chief Superintendent Vyvyan), John Dawson (Inspector Fullalove), Dino Shafeek (Ali), Jaron Yaltan (Mujob), Joan Scott (Mrs McVitie), John Rapley (Bouchet), John Gill (Dewhurst), Rafiq Anwar (Asif), and Marcia Warren (Annette).