Original sentence: During the next 15 years most of Roberts acting was confined to TV and Motion Pictures his most memorable performances in The Crooked Road (1965) with Robert Ryan and Steward Granger, Hell Is Empty (1967) produced by his brother Ronald Rietti and co-starring French actress Martine Carol (who died before the end of shooting the film), The Italian Job (1969) and The Omen (1976) with Gregory Peck.In motion pictures Robert still only 25 years of age continued to work mostly in character parts with the exception of his performances in Call of the Blood (1948),  Prelude to Fame (1950) and Stock Car (1955)
Edited sentence: During the next 15 years most of Roberts acting was confined to TV and Motion Pictures his most memorable performances in The Crooked Road (1965) with Robert Ryan and Stewart Granger, Hell Is Empty (1967) produced by his brother Ronald Rietti and co-starring French actress Martine Carol (who died before the end of shooting the film), The Italian Job (1969) and The Omen (1976) with Gregory Peck.In motion pictures Robert still only 25 years of age continued to work mostly in character parts with the exception of his performances in Call of the Blood (1948), Prelude to Fame (1950) and Stock Car (1955)