The Man Inside (1958)

A mild mannered jeweler's clerk (Nigel Patrick) steals a priceless diamond and kills a man in the process. He is pursued across Europe by two people: a private detective (Jack Palance) and a beautiful woman (Anita Ekberg) who claims the diamond belongs to her. Based on the novel by M.E. Chaber and directed by John Gilling (PLAGUE OF THE ZOMBIES). A decent enough international crime thriller that could have been so much better with a stronger script. The film focuses on the wrong man, Jack Palance's detective when it's Nigel Patrick's mild mannered clerk turned thief who's the most intriguing character but the screenplay doesn't give him any background and instead focuses on the detective's pursuit. With Anthony Newley, Donald Pleasence, Sid James and Anne Aubrey.