List of all movies and TV series
| O protaris Kai i Rita | Movie | 1989 | |
| O Puritano da Rua Augusta | Movie | 1965 | |
| O qizi tapin | Movie | 1970 | (Ishchite devushku) |
| O Que é Isso, Companheiro? | Movie | 1997 | (Four Days in September) |
| O Rei e os Trapalhões | Movie | 1979 | |
| O Roubo da Taça | Movie | 2016 | |
| O Sal da Terra | Movie | 2008 | |
| O Santo Milagroso | Movie | 1967 | (Der nicht ganz heilige Franziskus) |
| O Sathii Re | Movie | 2009 | ||
| O Segredo da Múmia (The Secret of the Mummy) | Movie | 1982 | (Muumion salaisuus) |
| O Signo da Cidade (The Sign of the City) | Movie | 2007 | (星の導き) |
| O simdi mahkum | Movie | 2005 | (In the Jail Now) |
| O sklenicku víc | Animation Movie | 1953 | (A Drop Too Much) |
| O som ao redor | Movie | 2012 | (Neighbouring Sounds) |
| O Sorriso do Lagarto | TV Series | 1991 | |
| O Stamatis kai o Grigoris | Movie | 1962 | |
| O Tasqueiro (Tavern Man) | Short Movie | 2012 | |
| O Tauromahos prohorei! | Movie | 1963 | ||
| O taxitzis | Movie | 1962 | (O Hatzihristos taxitzis) |
| O tetraperatos | Movie | 1966 | (Sharp as a Razor) |
| O Thalassolykos! | Movie | 1964 | |
| O Thanasis sti hora tis sfaliaras | Movie | 1976 | |
| O Thanasis, i Ioulietta kai ta loukanika | Movie | 1970 | |
| O the Power of Submission | Movie | 2006 | |
| O theios apo ton Kanada | Movie | 1959 | |
| O Trapalhão e a Luz Azul | Movie | 1999 | |
| O Trapalhão na Arca de Noé | Movie | 1983 | |
| O Trapalhão na Ilha do Tesouro | Movie | 1975 | |
| O Trapalhão nas Minas do Rei Salomão | Movie | 1977 | |
| O Trapalhão no Planalto dos Macacos | Movie | 1976 | |
| O trellos tahei 400 | Movie | 1968 | (The Right-Minded Madman) |
| O Trote dos Sádicos | Movie | 1974 | (Trote de Sádicos) |
| O Último Programa do Mundo | TV Series | 2013-2018 | |
| O vara cu Mara | Movie | 1988 | |
| O Vendedor de Lingüiças | Movie | 1962 | |
| O Vendedor de Sonhos | Movie | 2016 | |
| O Vigilante contra o crime | Movie | 1964 | |
| O Vigilante e os Cinco Valentes | Movie | 1964 | |
| O Vigilante em Missão Secreta | Movie | 1967 | |
| O Vigilante Rodoviário | Movie | 1962 | |
| O Vigilante Rodoviário | Movie | 1978 | |
| O voo do impossível | Animation Movie | 2021 | |
| O xerokefalos | Movie | 1970 | |
| O Xypolytos Pringips | Movie | 1966 | (The Barefoot Prince) |
| O zi buna de plaja | Short Movie | 2008 | |
| O zivot | Movie | 2008 | |
| O životu i o smrti | Movie made for TV | 2019 | |
| O zvířatech a lidech | TV Series | 1994 | (Die Tierklinik am Rande der Stadt) |
| O' Horten | Movie | 2007 | (O'Horten) |
| O' surdato 'nnammurato | Movie | 1983 | |
| O'Dessa | Movie | 2025 | (О'Десса) |
| O'Key ili Delo v shlyape | Movie | 2002 | |
| O'prah | Movie | 2008 | (Oprah: Hot Sunday) |
| O, Gevorg! | Short Movie | 1979 | ||
| O, schastlivchik! | Movie | 2009 | (O, Luckyman!) |
| O-nyanko za mûbî Kiki ippatu! | Movie | 1986 | (Onyanko the Movie - One Shot Crisis!) |
| O.C. and Stiggs | Movie | 1985 | (Black Cats) |
| O.G. | Movie | 2018 | |
| O.H.M.S. | Movie | 1937 | (Ao Serviço de Sua Majestade) |
| O.J. - Alt for Norge | TV Series | 2002 | |
| O.J. - en utstrakt hånd | TV Series | 1999 | |
| O.J. på nye eventyr | TV Series | 1995 | |
| O.J. ute på prøve | TV Series | 1994 | |
| O.K. Garage | Movie | 1998 | (All Revved Up) |
| O.K. patron | Movie | 1974 | (OK Patron) |
| O.K. Yevtushenko | Movie | 1968 | (Somebody's Stolen Our Russian Spy) |
| O.T. Genasis feat. Young Dolph: Cut It | Music Video | 2015 | ||
| O.T. Genasis: CoCo (TV Version) | Music Video | 2015 | ||
| O2 | Movie | 2020 | (Operacija 'O2') |
| OAS, un passé très présent | Documentary | 2008 | |
| Oasis: Don't Go Away | Music Video | 1997 | |
| Oasis: Don't Look Back in Anger | Music Video | 1996 | |
| Oasis: Falling Down | Music Video | 2009 | |
| Oasis: Go Let It Out | Music Video | 2000 | |
| Oasis: Songbird | Music Video | 2003 | |
| Oasis: Stand by Me | Music Video | 1997 | |
| Oasis: Supersonic | Music Video | 1994 | |
| Oasis: The Importance of Being Idle | Music Video | 2005 | |
| Oat Pramote: Suk San Wan Jeb | Music Video | 2022 | ||
| Oaza | Movie | 1972 | (Oasis) |
| Obaba | Movie | 2005 | (Obaba - Das Dorf der grünen Eidechse) |
| Obaltan | Movie | 1961 | (The Aimless Bullet) |
| Obatai Priye Adare | Movie | 1987 | |
| Občanský průkaz (Identity Card) | Movie | 2010 | (Dowód osobisty) |
| Obchod na korze | Movie | 1965 | (The Shop on Main Street) |
| Obchodníci | Movie | 2013 | |
| Obcy musi fruwac | Movie | 1993 | (Obcy musi fruwać) |
| Období digitální | Movie made for TV | 1982 | ||
| Obecná skola | Movie | 1991 | (The Elementary School) |
| Oben geblieben ist noch keiner | Movie | 1980 | |
| Ober | Movie | 2006 | (Waiter) |
| Ober, zahlen! | Movie | 1957 | (Hovimestari - lasku) |
| Oberst Redl | Movie | 1985 | (Colonel Redl) |
| Oberstadtgass | Movie | 1956 | (In allen Gassen wohnt das Glück) |
| Oběti: Hadí tanec | Movie made for TV | 2005 | |
| Oběti: Jiný člověk | Movie made for TV | 2004 | |
| Oběti: Karambol | Movie made for TV | 2009 | |
| Oběti: Nevlastní bratr | Movie made for TV | 2006 | |
| Oběti: Přepadení | Movie made for TV | 2000 | |
| Oběti: Svědek | Movie made for TV | 2002 |