List of all movies and TV series
| Operation Delta Force 3: Clear Target | Movie | 1998 | (Clear Target) |
| Operation Delta Force 4: Deep Fault | Movie | 1999 | (Operación Delta force 4) |
| Operation Delta Force 5: Random Fire | Movie | 2000 | |
| Operation Diplomat | Movie | 1953 | |
| Operation Dirty Dozen | Documentary | 1967 | |
| Operation Dumbo Drop | Movie | 1995 | (Operación Elefante) |
| Operation Dunkirk | Movie | 2017 | |
| Operation Filmmaker | Documentary | 2007 | |
| Operation Finale | Movie | 2018 | |
| Operation Fortune: Ruse de guerre | Movie | 2023 | (Operacion Fortune: El gran engaño) |
| Operation Ganymed | Movie | 1977 | (Operação Júpiter) |
| Operation Golden Phoenix | Movie | 1994 | (Operação Golden Phoenix) |
| Operation Good Guys | TV Series | 1997-2000 | (Operaatio hyvä yritys) |
| Operation London Bridge | Short Movie | 1975 | |
| Operation Mad Ball | Movie | 1957 | (O Baile Maluco) |
| Operation Manhunt | Movie | 1954 | |
| Operation Pacific | Movie | 1951 | (Unternehmen Seeadler) |
| Operation Petticoat | Movie | 1959 | (Anáguas a Bordo) |
| Operation Phoenix - Jäger zwischen den Welten | TV Series | 1997-1999 | |
| Opération Portugal | Movie | 2021 | (Operación Portugal) |
| Opération Portugal 2: la vie de château | Movie | 2024 | ||
| Operation Repo | Non-fiction TV | 2007-2014 | (Embargo por sorpresa) |
| Operation Repo: The Movie | Movie | 2009 | |
| Operation Rogue | Movie | 2014 | (Operation Rogue - Einsatz am Limit) |
| Operation Third Form | Movie | 1966 | (Unternehmen III. Klasse) |
| Opération Turquoise | Movie made for TV | 2007 | |
| Operation Valkyrie: The Stauffenberg Plot to Kill Hitler | Documentary | 2008 | |
| Operation Zucker | Movie made for TV | 2012 | |
| Operation Zucker - Jagdgesellschaft | Movie made for TV | 2016 | |
| Operation: Daybreak | Movie | 1975 | (Operation Daybreak) |
| Operatiunea Monstrul | Movie | 1976 | (Operation Monster) |
| Operator | Movie | 2015 | |
| Operazione Goldman | Movie | 1966 | (Lightning Bolt) |
| Operazione Kappa: sparate a vista | Movie | 1977 | (Day of Violence) |
| Operazione Odissea | Movie made for TV | 1999 | |
| Operazione poker | Movie | 1965 | (Operation Poker) |
| Operazione San Gennaro | Movie | 1966 | (The Treasure of San Gennaro) |
| Operazione San Pietro | Movie | 1967 | (Operation St. Peter's) |
| Opernball | Movie made for TV | 1998 | (Merénylet az Operabálon) |
| Opfergang | Movie | 1944 | (La prigioniera del destino) |
| Ophélia | Movie | 1963 | |
| Opinie z trasy | Documentary | 1976 | |
| Opowiesc atlantycka | Movie | 1955 | (The Atlantic Tale) |
| Opowiesc Harleya | Movie | 1987 | (Opowieść Harleya) |
| Opowiesc o drodze | Documentary | 1958 | (Road Story) |
| Oppai barê | Movie | 2009 | (Oppai Volleyball) |
| Oppenheimer | Mini-Series | 1980 | |
| Oppenheimer | Movie | 2023 | (Опенхаймер) |
| Opportunity Knocks | Movie | 1990 | (Dans les pompes d'un autre) |
| Opposing Force | Movie | 1986 | (Hellcamp) |
| Opposite Day | Movie | 2009 | (Super Kids) |
| Oprosti za kung fu | Movie made for TV | 2004 | (Sorry for Kung Fu) |
| Optimisti (The Optimists) | Movie | 2006 | (Optimistas) |
| Optimisty | TV Series | 2017 | |
| Options | Movie | 1989 | (Die Reise nach Tarzania) |
| Options to Live | Documentary | 1979 | |
| Opus | Short Movie | 1967 | |
| Opus | Movie | 2025 | (Alfred Morettis Opus) |
| Or | Movie | 2004 | (Eine Tochter) |
| Ora H | Movie | 1957 | |
| Ora Zero | Movie | 1979 | |
| Oracle | Movie | 2023 | |
| Orage | Movie | 1938 | (Le venin) |
| Orage | Movie | 2015 | (A Stormy Summer Night) |
| Orang minyak | Movie | 2007 | |
| Orange | Movie | 2010 | |
| Orange County | Movie | 2002 | |
| Orange est vert | Documentary | 1980 | ||
| Orange Is the New Black | TV Series | 2013-2019 | (勁爆女子監獄) |
| Orange: Mirai | Animation Movie | 2016 | |
| Oranges | Short Movie | 2004 | |
| Oranžinė legenda | Documentary | 1975 | ||
| Oratotis miden | Movie | 1970 | |
| Orbis Pictus | Movie | 1997 | (Ilusões de Órbita) |
| Órbita 9 | Movie | 2017 | (Orbiter 9) |
| Orca | Movie | 1977 | (Orca: Killer Whale) |
| Orchestral Manoeuvres in the North | Documentary | 2013 | ||
| Orcs! | Movie | 2011 | |
| Ordeal | Movie made for TV | 1973 | (Die Feuerprobe) |
| Ordeal by Innocence | Movie | 1984 | |
| Ordeal by Innocence | Mini-Series | 2018 | |
| Orden de matar | Movie | 1965 | |
| Orden für die Wunderkinder | Movie made for TV | 1963 | (Ritarimerkki ihmelapsille) |
| Order of the Eagle | Movie | 1989 | (Orden del Águila) |
| Orders Are Orders | Movie | 1954 | |
| Ordførerens dag | Documentary | 1967 | |
| Ordinary Decent Criminal | Movie | 2000 | |
| Ordinary Lies | TV Series | 2015-2016 | (Valkoisia valheita) |
| Ordinary Man | Movie | 2005 | (Un homme ordinaire) |
| Ordinary Miracles | Movie made for TV | 2005 | (Un padre para Sally) |
| Ordinary People | Short Movie | 1941 | |
| Ordinary People | Movie | 1980 | (Gente como uno) |
| Ordinary World | Movie | 2016 | (Un mec ordinaire) |
| Ordine firmato in bianco | Movie | 1974 | (Orders Signed in White) |
| Ördög vigye | Movie | 1992 | (The Devil Take It) |
| Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteir | Animation Series | 2013 | |
| Ore ore | Movie | 2013 | (It's Me, It's Me) |
| Ore wa matteru ze | Movie | 1957 | (I Am Waiting) |
| Ore wa, kimi no tame ni koso shini ni iku | Movie | 2007 | (Assault on the Pacific: Kamikaze) |
| Ore, Twintails ni Narimasu | Animation Series | 2014 | (Gonna Be the Twin-Tail!!) |