| An Occurrence at Owl Creek Bridge |   |
| O Pioneers! | |
| Odds in My Favor | |
| Of All the Wide Torsos in All the Wild Glen | |
| Oh, Holy Allen Ginsberg | |
| Oh, What a Tangled Web | |
| Old Goat Song | |
| Old Jake's Skirts | |
| Oliver Twist | |
| On Stage Mr. Smith (manuscript) | |
| On With the Shrew! | |
| Once Upon a Shoe or The Rhymes and Mimes of Mother Goose and Her Traveling Troubadours | |
| Once Upon a Shoe or The Rhymes and Mimes of Mother Goose and Her Traveling Troubadours (musical) | |
| Once Upon a Summertime | |
| Once Upon a Vine | |
| Once, in the Time of Trolls | |
| One Bad Apple | |
| One Day at the Zoo | |
| One Day in the Life of Ivan Denisovich | |
| Open House at Hightower U. | |
| Opened Mail | |
| Opening of a Door O/P | |
| Othello or Tracking the Green-eyed Monster | |
| Our American Cousin | |
| Our Miss Brooks | |
| Out of Order | |
| Over and Up | |
| Oz | |
| The Odyssey | |
| The Othello | |
| The Other Shakespeare | |
| The Other Wise Man | |
| The Outcasts of Poker Flat | |
