Plays – O
- The O Flynn, by Justin Huntly McCarthy
- O Gemini, by Gilbert Albert Beckett
- O Mistress Mine, by Ben Travers
- Object Darts: Little Red Riding Hood, by unknown
- Objective Perspective, by unknown
- Observations of a Mature Student, by David Burke and Frank McCormack
- Observe the Sons of Ulster …, by Frank McGuiness
- Observe the Sons of Ulster Marching Towards the Somme, by Frank McGuiness
- Occupations, by Trevor Griffiths
- Occupied Territory, by unknown
- The Ocean of Life, by unknown
- Ocean’s Eleven, by unknown
- The Odd Couple, by Neil Simon
- Odd Girl Out, by Ronald Millar
- Odd Man In, by Claude Magnier
- Odds and Ends, by Harry Grattan
- Odds, The – What they were; who won; and who lost them, by Sefton Parry
- An Ode to my Sisters, by unknown
- The Odyssey, by Derek Walcott
- The Odyssey, by Derek Walcot
- The Odyssey, by David Farr
- The Odyssey, by Mary Zimmerman
- Oedipus, by Seneca
- Oedipus , by Seneca (c4BC-65AD)
- Oedipus, by Seneca (c4BC-65AD)
- Oedipus at Colonus, by Sophocles
- Oedipus Coloneus, by Sophocles
- The Oedipus Plays – Mask workshop, by Sophocles
- The Oedipus Plays, by Seneca
- The Oedipus Plays, by Sophocles
- The Oedipus Question, by Rani Drew
- Oedipus Rex, by Sophocles
- Oedipus the King, by Sophocles
- Oedipus Tyrannos, by Sophocles
- Oedipus Tyrannus, by Sophocles
- Of Cabbages and Kings by David Monico, by unknown
- Of Mice and Men, by John Steinbeck
- Of Thee I Sing, by unknown
- Off The Record, by Ian Hay
- Officer 666, by Augustin Machugh
- Official Secrets, by David Farnsworth
- Offstage\Onstage: Costume Design and Making, by unknown
- Offstage\Onstage: Directing and Writing, by unknown
- Offstage\Onstage: Props and Armoury, by unknown
- Offstage\Onstage: Set Design and Scene Painting, by unknown
- Offstage\Onstage: Sound and Lighting, by unknown
- Offstage\Onstage: Stage Management and Theatre Administration, by unknown
- Offstage\Onstage: The Cottesloe Theatre, by unknown
- Offstage\Onstage: The Olivier Theatre, by unknown
- Oft in the Stilly Night, by unknown
- The Ogre, by Henry Arthur Jones
- Ogun Abibiman, by Wole Soyinka
- Oh Les Beaux Jours, by Samuel Beckett
- Oh There You Are, by Daniel Mornin
- Oh What a Lovely War, by unknown
- Oh What a Lovely War, by Charles Chilton, Joan Littlewood and members of the Theatre Workshop Co., by unknown
- Oh! I Say!!, by Sydney Blow
- Oh! My Papa!, by Juerg Amstein
- Oh! Oh! Delphine!, by C M S Mclellan
- Oh! What A Lovely War!, by Charles Chilton
- Oh! What A Lovely War!, by Joan Littlewood
- Oh! You Letty, by Geoffrey Kerr
- Oh, Daddy!, by Austin Melford
- Oh, Kay!, by P G Wodehouse
- The Okey-Kokey Karaoke Show, by unknown
- Oklahoma, by Oscar Hammerstein II
- Oklahoma!, by unknown
- Old Acquaintance, by John Van Druten
- Old Adam, by C Hamilton
- Old Bailey, by T C Worsley
- The Old Bensonian Matinee, by William Shakespeare
- Old Bensonian’s Matinee, by unknown
- Old Booty!, by unknown
- Old Chateau, The; or, A Night of Peril, by Stirling Coyne
- Old Chelsea, by Walter Ellis
- The Old Country, by Alan Bennett
- The Old Devils, by Kingsley Amis
- Old Flames, by E A Whitehead
- The Old Folks at Home, by H M Harwood
- Old Guard, by Dion Boucicault
- Old Guard, by unknown
- Old Heidelberg, by Rudolf Bleichmann
- The Old Home, by unknown
- Old King Cole, by unknown
- The Old Ladies, by Rodney Ackland
- An Old Man’s Love, by Michael Napier Brown
- Old Mother Hubbard by David Wood, by unknown
- Old Mother Riley And Her Daughter Kitty, by unknown
- Old Movies, by Bill Bryden
- Old Music, by Keith Winter
- Old Nobility, by James Bridie
- Old Time Music Hall, by unknown
- Old Times, by Harold Pinter
- Old Tyme Music Hall, by unknown
- Old Wicked Songs, by Jon Marans
- The Old Woman who lived in a Shoe, by unknown
- Old World, by Aleksei Arbuzov
- Old Year’s Eve, by Peter Speyer
- Oleanna, by David Mamet
- Oliver, by Charles Dickens
- Oliver, by Jean Bart
- Oliver, by Lionel Bart
- Oliver Cromwell, by John Drinkwater
- Oliver Ford Davies: Playing Lear, by unknown
- Oliver Sachs, by unknown
- Oliver Twist, by Joseph W Comyns Carr
- Oliver Twist, by Charles Dickens
- Oliver Twist, by R Thorndike
- Oliver!, by unknown
- Olivia, by unknown
- Olivier: Hamlet to Hollywood, by unknown
- On, by Jim Cartwright
- On a Clear Day You Can See Canterbury by Charles Colby, by unknown
- On A Night Like This, by John Godber
- On Approval, by Frederick Lonsdale
- On Dartmoor, by N Grant
- On Duty, by unknown
- On the Boil by John Albery and John Gould, by unknown
- On the High Road, by Anton Chekhov
- On the Ledge, by Alan Bleasdale
- On the Marionette Theatre, by unknown
- On The Razzle, by Tom Stoppard
- On the Razzle, by Johann Nestroy
- On The Rocks, by B Shaw
- On The Rocks, by G B Shaw
- On the Shore of the Wide World, by unknown
- On The Spot, by Edgar Wallace
- On the Town, by Betty Comden
- On Top, by Liane Aukin
- On Trial, by unknown
- On With The Dance, by Sir Nöel Coward
- On Your Honour, by Roger Leach and Colin Wakefield, by unknown
- On Your Toes, by Rogers And Hammerstein
- Once a Catholic, by Mary O Malley
- Once A Crook, by Evadne Price
- Once in a Lifetime, by Moss Hart and George S Kaufman
- Once in a Lifetime, by unknown
- Once in a While the Odd Thing Happens, by Paul Godfrey
- Once More with Feeling, by Harry Kurnitz, by unknown
- Once On This Island, by unknown
- Once Upon a Mattress, by Jay Thompson
- Once Upon a Tiger, by unknown
- Once Upon A Time, by Louis N Parker
- Ondine, by Jean Giraudoux
- Ondine, by unknown
- One Day More, by J Conrad
- One Flea Spare, by Naomi Wallace
- One Flew Over the Cuckoo’s Nest, by Dale Wasserman
- One For the Pot, by Ray Cooney
- One For the Road, by Willy Russell
- One Hour, by unknown
- One Hour, or, A Carnival Frolic [Ball], by Thomas Haynes Bayly
- One Life, by unknown
- One Little Word, by unknown
- One Love, by Kwame Dawes
- One Man, by Steven Berkoff
- One Man’s Meat, by T Muschamp
- One Night Stand, by unknown
- One of These Days, by Leo Butler
- One Thousand Fishes, by unknown
- One Touch of Venus, by Ogden Nash
- One Way Pendulum, by N F Simpson
- One Woman Plays, by Dario Fo
- One Woman Plays, by Dario Fo and Franca Rame
- One-Act Plays, by unknown
- Onethousandladders, by unknown
- Only Fourteen Lines: a selection of Shakespeare’s sonnets, by William Shakespeare
- The Only Way, by Freeman Wills
- Ooh Missus!, by Winnie Elliott
- Oom-Pah-Pah, by Caryl Brahms
- The Open Couple, by unknown
- Opera – Interpreting the Classics, by unknown
- An Opera Workshop, by unknown
- Operation Elvis, by C P Taylor
- Operette, by Sir Nöel Coward
- The Oracle, by unknown
- Orange Moll by Sheila Dewey, by unknown
- Orange Moll by Sheila Dewy, by unknown
- The Orange Orchard, by Eden Philpotts
- Orangeman, by St J Ervine
- The Orchard Walls, by R F Delderfield
- The Orchestra, by Jean Anouilh
- The Orchid, by James T Tanner
- The Orestean Trilogy, by Aeschylus
- The Oresteia, by Aeschylus
- The Oresteia: The Daughters of Darkness, by Aeschylus
- The Oresteia: The Home Guard, by Aeschylus
- Orestes, by Euripides
- Origins, by Richard Le Page
- Oroonoko, by Aphra Behn
- Oroonoko, by T Southerne
- The Orphan’s Comedy, by Chris Hanaan
- The Orphan, by Thomas Otway
- Orphans, by Lyle Kessler
- Orpheus, by unknown
- Orpheus and Eurydice, by Edward Rose
- Orpheus Descending, by Tennessee Williams
- Orpheus in the Underground, by Alfred Noyes
- Orpheus in the Underworld, by Hector Cremieux
- Orpheus in the Underworld, by unknown
- Orwell’s England, by unknown
- Osama the Hero, by Dennis Kelly
- Oscar Wilde Stories, by unknown
- Otello, by Giuseppe Verdi
- Otello, by Arrigo Boito
- Otello, by unknown
- Othello, by William Shakespeare
- Othello, by Francis Hueffer
- Othello: The Travellers Return, by unknown
- The Other Heart, by James Forsyth
- Other People’s Houses, by Lynne Dexter
- Other People’s Money, by Jerry Sterner
- Other People’s Worries, by R C Carton
- Other Places, by Harold Pinter
- Other Places, by unknown
- The Other Side of Love, by Dion Clayton Calthrop
- The Other Side of the Room, by Ivor Powell
- Other Voices, by unknown
- Other Voices Other Rooms, by Truman Capote
- Our American Cousin, by unknown
- Our Betters, by W. Somerset Maugham
- Our Boys, by Jonathan Lewis
- Our Country’s Good, by Timberlake Wertenbaker
- Our Country’s Good, by unknown
- Our Father, by Edna O Brien
- Our Flat, by unknown
- Our Friends in the North, by Peter Flannery
- Our Future Fate, by J Dobbs
- Our History, by unknown
- Our House, by unknown
- Our Lady of Sligo, by Sebastian Barry
- Our Little Fancies, by Margaret Macnamara
- Our Man in Havana, by Graham Greene
- Our Miss Gibbs, by Adrian Ross
- Our Mr Hepplewhite, by unknown
- Our Nell, by Louis N Parker
- Our Own Kind, by Roy Macgregor
- Our Own Lives, by Gertrude Jennings
- Our Peg, by Edward G Knoblauch
- Our Song, by Keith Waterhouse
- Our Town, by Thornton Wilder
- Our Wife, by Leslie Sands, by unknown
- Our World Ourselves – Poetry Day: Loud and Clear, by unknown
- Our World Ourselves – Poetry Day: Samuel Beckett Reading, by unknown
- Our World Ourselves – Poetry Day: War Poetry and Poetry of Conscience, by unknown
- Ours, by Thomas William Robertson
- Ourselves Alone, by Anne Devlin
- Out At The Bush, by unknown
- Out Goes She, by Arnold Ridley
- Out of a House Walked a Man, by Daniil Kharms
- Out of Africa, by unknown
- Out of Bounds, by Julian Slade
- Out of Bounds, by Scarlet Harlets
- Out Of Order, by Ray Cooney
- Out Of Order, by Michael Cooney
- Out Of The Blue, by unknown
- Out of the Dark, by Ingram D Abbes
- Out of the East, by James Fenton
- Out of the Flying Pan by David Campton, by unknown
- Out Of The Frying Pan, by R Stock
- Out of the Whirlwind, by Christopher Hassall
- Out of This World, by Dwight Taylor
- Out or Order, by Ray Cooney
- Out To Win, by Dion Clayton Calthrop
- Out With The Old, by unknown
- Outcast, by F W Mallock
- Outer Sight, by unknown
- Outlaw, by A Strindberg
- Outside Edge, by Richard Harris
- Outskirts, by Hanif Kureishi
- Outta Here, by unknown
- Outward Bound, by Sutton Vane
- Over A Garden Wall, by E Baker
- Over Hear, by Neil Biswas
- Over My Dead Body, by Michael Sutton
- Over the Garden Fence, by Elizabeth Addyman
- Over The Moon, by Vivian Ellis
- Over The Moon, by Ken Ludwig
- Over The Page, by Desmond Carter
- Over the Rainbow – The Eva Cassidy Story, by unknown
- Over the Years, by unknown
- Overboard, by Michel Vinaver
- Overheard, by Peter Ustinov
- Overruled, by George Bernard Shaw
- The Overwhelming, by J T Rogers
- Owen, Prince of Powys, by unknown
- Owl and the Pussycat Went To See, by Sheila Ruskin
- The Oxford and Cambridge Boat Race, by unknown
- The Oz Trial, by unknown
Beta testing (dress rehearsal)