The internet movie database has the following to say about William Berger.
William Berger is inseparably linked with Spaghetti Western, but he participated also in numerous other productions and thus co-operated with unbelievably many interesting directors such as as Enzo Castellari, Sergio Sollima, Duccio Tessari, Gianfranco Parolini and many others. Austrian born Berger moved to USA in 1940 during WWII, without even knowing what really he wanted to become. At first he studied engineering and later served in Air Force during the Korea war. Worked in New York at IBM, but having sometimes no support he actually wanted to write. Then he joined an evening class for television script letters and drama. Once his professor suddenly asked him to replace one of the actors in the evening piece at the week final college in Rhode Island. With his straight performance, being actually no actor, Berger made all consider him as professional stage actor from New York. He discovered that playing and learning the role were very enjoyable for him and began to work in the world of show. Next ten years he proved himself by playing on Broadway theatre in staging as "Who's Afraid of Virginia Woolf" and "Saturday Night Lonely Night" with Henry Fonda. During a tour with his group in Rome, Italy his convincingly acting in combination of his blue eyes and blond hair was noted and he was chosen for the role of Benny in one of segments of director Marko Ferreri "L'Uomo dei cinque palloni" (1965), opposite Marchello Mastroianni. Later William Berger has appeared in a long and impressive list of Spaghetti Westerns, including genre classics as "Faccia a Faccia" (1967), directed by Sergio Sollima, "Sartana" and it sequels, "Oggi a meâ€¦domani a te!" (1968), opposite Bud Spencer. One of his most memorable performances was as 'Banjo' in the first "Sabata" movie, where he co-starred with another western icon Lee Van Cleef. The career of Berger slowed down when he was involved in a drug story. On 4 August 1970 in the course of anti-drug operation, the police found hashish in his villa in Costa Amalfi, near Naples, Italy. He and his second wife, the actress Carolyn Lobravico were arrested and put up in the criminal lunatic asylum of Pozzuoli, where Carolyn died of acute peritonitis. Berger was transferred into Salerno prison for a few months. After some terrible judicial vicissitude he was released and began one new career with beautiful thriller "Mio caro assassino" (1972). Berger also starred in favourities as "Uomoni Duri" (1974) with Lino Ventura, "California" (1977) co-starred with Giuliano Gemma, Luigi Cozzi's "Hercules" (1983) and many others. In "Keoma" (1976) he portrayed the father of Franco Nero's character Keoma. Later he appeared again with Nero in numerous of movies as Il Giorno del Cobra (1980), Die FÃ¶rsterbuben (1984), Django 2: il grande ritorno (1987), Top Line (1988) and one of his last, Das Babylon Komplott (1993). William Berger died on 2 October 1993 at his home in Vienna, Austria.