Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Dirty Harry | 1971 | |
| Writer | Das Boot | 1981 | |
| Writer | High Plains Drifter | 1973 | |
| Writer | Sudden Impact | 1983 | |
| Writer | The Enforcer | 1976 | |
| Writer | Play Misty for Me | 1971 | |
| Writer | Coogan's Bluff | 1968 | |
| Writer | The Sting II | 1983 | |
| Writer | Charley Varrick | 1973 | |
| Writer | Fatal Beauty | 1987 |