In the early 1970s, Delon made another attempt at the English speaking market. "The Assassination of Trotsky" (1972) for Joseph Losey was poorly received but "Red Sun" (1972), with Charles Bronson and Toshiro Mifune, did well. In France he appeared opposite Simone Signoret in "The Widow Couderc" (1971). He made his third film with Melville, "Un flic" (1972). He produced and starred in a romantic drama, "Indian Summer" (1972), then made some thrillers: "Traitement de choc" (1973), and "Tony Arzenta" (1973). In 1973, he recorded a duet with Dalida, "Paroles, paroles", a popular French-language version of the Italian song "Parole parole". He tried again for Hollywood stardom with "Scorpio" (1973), with Burt Lancaster for director Michael Winner. It was only a minor hit. In France, he made "The Burned Barns" (1973) and "Creezy" (1974). He produced "Two Men in Town" (1974) which re-teamed him with Jean Gabin, and "Borsalino & Co." (1974), a sequel to his earlier hit. After another gangster thriller, "Icy Breasts" (1974), Delon returned to his first swashbuckler since "The Black Tulip", playing the title character in the 1975 Italian-French film "Zorro". He made some more crime filmes: "The Gypsy" (1975), "Flic Story" (1975) (with Jean Louis Triginant), "Boomerang" (1976) and "Armaguedon" (1976). In 1976, Delon starred in "Monsieur Klein", for which he was nominated for the César Award.