| An Implausible Claus |  |
| An Irish Play |  |
| I Ain't Yo' Uncle: The New Jack Revisionist Uncle Tom's Cabin |  |
| I Have Before Me a Remarkable Document Given to Me by a Young Lady From Rwanda |  |
| I Just Stopped By to See the Man |  |
| I Know I Saw Gypsies |  |
| I Never Saw Another Butterfly |  |
| I Never Saw Another Butterfly (musical) |  |
| I Never Saw Another Butterfly (one act) |  |
| I Saved a Winter Just for You |  |
| I Was a Teen-age Dracula |  |
| I Will Sing Life: Voices From the Hole in the Wall Gang Camp |  |
| I'll Fly Away |  |
| I'm a Family Crisis |  |
| I'm a Stranger Here Myself |  |
| I've Hit an Iceberg |  |
| If Boys Wore the Skirts (Non-royalty) |  |
| If Girls Asked Boys for Dates (Non-royalty) |  |
| If It's Monday, This Must Be Christmas! |  |
| If It's Monday, This Must Be Murder! |  |
| If the Shoe Fits |  |
| Importance of Being Earnest, The (Clark) |  |
| In Space |  |
| In the Company of Sinners and Saints |  |
| In the Garden of Live Flowers |  |
| In the Garden of the Selfish Giant |  |
| In the Middle of Grand Central Station |  |
| In the Middle of Nowhere |  |
| In the Tank |  |
| Inadmissible Evidence |  |
| Inside Out-Upside Down (manuscript) |  |
| Interrupting Vanessa |  |
| Inventing Montana |  |
| Iron Kisses |  |
| Iron Kisses (Beses de Hierro - Spanish manuscript) |  |
| It Happens Every Summer |  |
| It's a Slippery Slope |  |
| It's a Wonderful Life |  |
| It's a Wonderful Life (radio manuscript) |  |
| It's Murder in the Wings! |  |
| The Ice Wolf |  |
| The Illustrated Woman |  |
| The Imaginators |  |
| The Inexperienced Ghost |  |
| The Informer |  |
| The Initiation |  |