Drehbuchautor bei
| 2006 | Superman II: The Richard Donner Cut | ||
| 1998 | The Last Don II | ||
| 1992 | Christopher Columbus -Der Entdecker | ||
| 1992 | Der Pate Trilogie | ||
| 1990 | Der Pate 3 | ||
| 1987 | Der Sizilianer | ||
| 1984 | Cotton Club | ||
| 1982 | Zeit zu sterben | ||
| 1980 | Superman II - Allein gegen Alle | ||
| 1978 | Superman | ||
| 1974 | Der Pate 2 | ||
| 1974 | Erdbeben | ||
| 1972 | Der Pate | ||
| Young Justice |
mitgespielt in
| 2002 | Stone Reader | ||
| 2002 | The Kid Stays in the Picture | ||
| 1990 | The Godfather Family: A Look Inside |