Christopher Reeve later made even higher gains for "Superman III" (1983), though for "" (1987), he decided it would be healthier to focus more on cardiovascular workouts. One of the reasons Reeve could not work out as much for "" was an emergency appendectomy he had in June 1986. Reeve was never a Superman or comic book fan, though he had watched "Adventures of Superman" starring George Reeves. Reeve found the role offered a suitable challenge because it was a dual role. He said, "there must be some difference stylistically between Clark and Superman. Otherwise, you just have a pair of glasses
Superman (1978 film) as big an asshole as the Salkinds." Two more films, "Superman III" (1983) and "" (1987), were produced. "Superman Returns" was released in 2006. Director Bryan Singer credited the 1978 "Superman" as an influence for "Superman Returns", and used restored footage of Brando as Jor-El. "" also was released in 2006. The film's final sequence, which features Superman flying high above the Earth at sunrise, and breaking the fourth wall to smile briefly at the camera, featured at the end of every Superman film starring Reeve. Because "Superman" went into production prior to the releases of "Star Wars" (May 1977)