Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Star Wars - Episode V - The Empire Strikes Back | 1980 | |
| Writer | Rio Bravo | 1959 | |
| Writer | The Big Sleep | 1946 | |
| Writer | The Long Goodbye | 1973 | |
| Writer | El Dorado | 1966 | |
| Writer | Hatari! | 1962 | |
| Writer | Rio Lobo | 1970 |
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Star Wars - Episode V - The Empire Strikes Back | 1980 | |
| Writer | Rio Bravo | 1959 | |
| Writer | The Big Sleep | 1946 | |
| Writer | The Long Goodbye | 1973 | |
| Writer | El Dorado | 1966 | |
| Writer | Hatari! | 1962 | |
| Writer | Rio Lobo | 1970 |