In 1963, Henry Silva played the lead role in the gangster film Johnny Cool, which was produced by United Artists and Chrislaw. His character Salvatore "Johnny Cool" Giordano was a hitman sent on a mission by exiled mobster Johnny Colini to kill the underworld figures who had plotted against the mobster. Premiering on October 19, 1963, the film was successful at the box-office and was critically well received. So was the actor's first lead performance, which carried the film. The strong supporting cast features Elizabeth Montgomery, Mort Sahl, Telly Savalas, Jim Backus, Joey Bishop, and Sammy Davis, Jr., most of whose characters were murdered by Silva's murders during the course of the film. Variety praised Silva's performance, writing "Henry Silva, as a Sicilian-born Assassin, is at home as the 'delivery boy of death'". The film's box-office receipts dropped by late November (partly due to the death of President John F. Kennedy).