Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Divorzio all'italiana | 1961 | |
| Writer | War and Peace | 1956 | |
| Writer | La maschera del demonio | 1960 | |
| Writer | Ulisse | 1954 | |
| Writer | The Treasure of San Gennaro | 1966 | |
| Writer | The Colossus of Rhodes | 1961 | |
| Writer | Il Grido | 1957 | |
| Writer | The Girl Who Knew Too Much | 1963 | |
| Writer | Salon Kitty | 1976 | |
| Writer | Le fatiche di Ercole | 1958 | |
| Writer | The Last Days of Pompeii | 1959 | |
| Director | Hitler: The Last Ten Days | 1973 | |
| Writer | Hitler: The Last Ten Days | 1973 | |
| Writer | Devil in the Flesh | 1986 | |
| Writer | Schöner Gigolo, armer Gigolo | 1978 | |
| Writer | Guns for San Sebastian | 1968 | |
| Writer | Un maledetto imbroglio | 1959 | |
| Writer | De rode tent | 1969 | |
| Writer | Duel of the Titans | 1961 | |
| Writer | Madame | 1961 | |
| Writer | Attila | 1954 | |
| Writer | Attack and Retreat | 1964 | |
| Writer | A Place for Lovers | 1968 | |
| Writer | Violent Life | 1962 | |
| Writer | Four of the Apocalypse | 1975 | |
| Writer | Ercole e la regina di Lidia | 1959 | |
| Writer | Jessica | 1962 | |
| Writer | How Do I Love You? | 1966 | |
| Writer | The Warrior and the Slave Girl | 1958 | |
| Writer | Weekend, Italian Style | 1965 | |
| Writer | There Was a Castle with Forty Dogs | 1990 | |
| Writer | Bluebeard | 1972 | |
| Writer | My Son, the Hero | 1962 | |
| Writer | Don Bosco | 1988 |