
| Show Title | Synopsis | Category |
| Oedipus at Colonus | ... | play |
| Oedipus rex | ... | opera |
| Oedipus The King | ... | play |
| Of Thee I Sing | ‘Of Thee I Sing’ is a political satire focusing on the election campaign and Presidency of John ... | musical |
| Oh Captain! | ‘Oh, Captain!’ concerns a proper British couple – Captain Henry St. James and wife Maud. Capt... | musical |
| Oh! Calcutta! | ‘Oh, Calcutta!’ is a theatrical revue consisting of various sketches on sex-related topics.... | musical |
| Oh, Kay! | Taking place in 1927 during the time of Prohibition, the show takes place at a beach house owned by ... | musical |
| Oklahoma | The classic musical is the story of Laurey and the two rivals for her affections: Curly, a cowboy, a... | musical |
| The Old Maid and the Thief | ... | opera |
| Oleanna | Oleanna is David Mamet’s study of power and gender in academia. Carol, a student who is strugglin... | play |
| Oliver! | Oliver Twist is a young boy who lives in a workhouse with other orphaned boys. When Oliver disru... | musical |
| Olivo e Pasquale | ... | opera |
| On a Clear Day You Can See Forever | Daisy Gamble has some unusual powers like hearing phones before they ring and making flowers grow ju... | musical |
| On Golden Pond | The play is a classic American comedy/drama that's every bit as touching, warm, and witty today as w... | play |
| On the Town | On the town is the tale of three sailors on a 24 hour leave from their ship docked in New York City.... | musical |
| On the Twentieth Century | ‘On the Twentieth Century’ focuses on egomaniacal producer Oscar Jaffee and his volatile... | musical |
| On Your Toes | While teaching music at Knickerbocker University, Junior Donal tries to pursuade Sergei Alexandrovic... | musical |
| Once On this Island | Taking place on a Caribbean island divided by social prejudice, ‘Once On This Island’ is a calyp... | musical |
| Once Upon a Mattress | Due to an unhappy curse, King Sextimus is unable to speak. Meanwhile, his terror of a wife, Queen A... | musical |
| Oresteia | ... | opera |
| Oresteia | ... | play |
| L'Orfeo | The story is based on the ancient Greek myth of Orpheus. Orpheus has just married his lover, Eurydi... | opera |
| Orfeo ed Euridice | ... | opera |
| Orlando | Orlando (Roland), a great soldier in Charlemagne's army, falls desperately in love with the pagan pr... | opera |
| Ormindo | The foreign princes, Amida and Ormindo, who are assisting in the defense of Mauretania, are both in ... | opera |
| Orpheus in the Underworld | ... | opera |
| Otello | After Otello returns back to Venice after a victorious battle over the Turks, he wants to marry his ... | opera |