Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Assassinio sull'Orient Express | 2017 | |
| Writer | Assassinio sul Nilo | 2022 | |
| Writer | Mistero a Crooked House | 2017 | |
| Writer | Assassinio sull'Orient Express | 1974 | |
| Writer | They Were Ten | ||
| Writer | Testimone d'accusa | 1957 | |
| Writer | Assassinio sul Nilo | 1978 | |
| Writer | Delitto sotto il sole | 1982 | |
| Writer | Dieci piccoli indiani | 1945 | |
| Writer | Assassinio allo specchio | 1980 | |
| Writer | Appuntamento con la morte | 1988 | |
| Writer | Dieci piccoli indiani | 1965 | |
| Writer | ...e poi, non ne rimase nessuno | 1974 | |
| Writer | Due per un delitto | 2005 | |
| Writer | Assassinio sul treno | 1961 | |
| Writer | Poirot: Sipario - L'ultima avventura di Poirot | 2013 | |
| Writer | Istantanea di un delitto | 2008 | |
| Writer | Poirot: Corpi al sole | 2001 | |
| Writer | Partners in Crime | 2012 | |
| Writer | Assassinio sul palcoscenico | 1964 | |
| Writer | Assassinio sull'Orient Express | 2001 | |
| Writer | Agatha Christie: Caccia al delitto | 1986 | |
| Writer | Tredici a tavola | 1985 | |
| Writer | Dieci Piccoli Indiani | 1989 | |
| Writer | Agatha Christie: Delitto in tre atti | 1986 | |
| Writer | Assassinio allo specchio | 1992 | |
| Writer | Poirot: Macabro quiz | 2008 | |
| Writer | Assassinio a bordo | 1964 | |
| Writer | Giochi di prestigio | 1991 | |
| Writer | Miss Marple: A Caribbean Mystery | 1989 | |
| Writer | Poirot e il Caso Amanda | 1965 | |
| Writer | Morte nel villaggio | 1986 | |
| Writer | Witness for the Prosecution | 1982 | |
| Writer | Agatha Christie's Seven Dials Mystery | 1981 | |
| Writer | Alibi e sospetti | 2008 | |
| Writer | Miss Marple nei Caraibi | 1983 | |
| Actor | Agatha Christie vs Hercule Poirot | 2017 | Agatha Christie |
| Writer | L'uomo dall'abito marrone | 1989 | |
| Writer | Champagne per due dopo il funerale | 1972 | |
| Writer | Assassinio allo specchio | 1985 | |
| Writer | È troppo facile | 1982 | |
| Writer | Ten Little Indians | 1987 | |
| Actor | Agatha Christie: The Queen of Crime | 2018 | Agatha Christie |
| Writer | Intrigo perverso | 1995 | |
| Writer | Why Didn't They Ask Evans? | 1980 | |
| Writer | Sparkling Cyanide | 2003 | |
| Writer | Addio Miss Marple | 1987 |