Agent X-77 Orders to Kill is a 1966 French-Spanish-Italian spy film directed by Maurice Cloche and starring Gérard Barray and Sylva Koscina. Silvio Siano is credited as co-director in the Italian version of the film (credited as "Edgar Lawson") due to co-production obligations. It is loosely based on the novel Silence clinique by Eddy Ghilain. A government agent tries to prevent foreign spies from obtaining a scientist's formula for a solid-rocket-fuel.