 After 1957, he continued to write screenplays.He was one of the writers on "Spring Reunion" (1957), notable as Betty Hutton's final film, following with "Warlock" (1959), and his earlier association with Cassavetes led to script contributions on the actor's directorial debut with "Shadows" (1959).After an uncredited contribution to "Lilith" (1964), he scripted John Frankenheimer's "Grand Prix" (1966).