| Name (742) | Creators | Event Dates | Events | Resources |
|---|---|---|---|---|
| Instability Strip | Blue Straggler Productions | 2010 | 1 | |
| Instant Marriage | Bob Grant, Laurie Holloway | 1965 | 2 | |
| Instructions for Modern Living | ||||
| Instructions for Modern Living | Duncan Sarkies, Nic McGowan | 2006 | 1 | |
| Insult and Apology | 1871 | 1 | ||
| Int. | Carolyn Dawes, Toby Rice | 2017 | 1 | |
| Interference | J W Heming | 1924 - 1928 | 3 | |
| Interim | Adam Antonelli, Anna North, Georgina Wood, Karyn Brown, May Dore, Pauline Trenerry | 2019 | 1 | |
| Interior | Maurice Maeterlinck | 1940 | 1 | 1 |
| Interior: Panic | Tennessee Williams | 2015 | 1 | |
| Interiors, Exteriors | Richard Meale | 1999 | 1 | |
| Interjections | J W Heming | 1934 | 1 | |
| Interlude | Paul Johnstone | 1936 | 1 | |
| Interlude | Maggi Sietsma | 1985 | 1 | |
| An Interlude in Porcelain | D M Stuart, E V Davenport | 1939 | 1 | |
| Interlude Rococo | John Alden | 1937 | 1 | |
| Interlude With a Corpse and Candle | Oriel Mullarky | 1930 | 1 | 1 |
| Interlude: The Morning After | Brian Young | |||
| Interludes | Anthony Pateras | 2007 | 1 | |
| Interludes from Mer de Glace | Richard Meale | 1992 | 1 | |
| Intermezzi, Op. 117 | Johannes Brahms | 1900 | 1 | |
| Intermezzo | Enrique Granados | 1956 | 1 | |
| Intermezzo | Vincent Godfrey | 1945 | 2 | |
| Intermezzo for Left Hand | Miriam Hyde | 1953 | 1 | |
| Intermezzo in A Major, Op. 118, No. 2 | Johannes Brahms | 1944 - 1959 | 5 | |
| Intermezzo in A Major, Op. 76, No. 6 | Johannes Brahms | 1945 - 1952 | 6 | |
| Intermezzo in A Minor, Op. 118, No. 1 | Johannes Brahms | 1950 - 1954 | 2 | |
| Intermezzo in B Minor, Op. 119, no.1 | Johannes Brahms | 2019 | 1 | |
| Intermezzo in B Minor, Op. 4, No. 6 | Robert Schumann | 1907 | 1 | |
| Intermezzo in B-Flat Minor, Op. 117, No. 2 | Johannes Brahms | 1949 | 1 | |
| Intermezzo in C Major, Op. 119, No. 3 | Johannes Brahms | 1908 - 1953 | 7 | |
| Intermezzo in E Major, Op. 116, No. 4 | Johannes Brahms | 1956 - 1957 | 2 | |
| Intermezzo in E Major, Op. 116, No. 6 | Johannes Brahms | 1958 | 1 | |
| Intermezzo in E Minor, Op. 4, No. 2 | Robert Schumann | 1911 | 1 | |
| Intermezzo in E-Flat Major, Op. 117, No. 1 | Johannes Brahms | 1950 - 1951 | 2 | |
| Intermezzo in E-Flat Minor, Op. 118, No. 6 | Johannes Brahms | 1939 - 1958 | 5 | |
| Intermezzo in E-Flat Minor, Op. 26, No. 4 | Robert Schumann | 1907 | 1 | |
| Intermezzo, Op. 93, No. 5 | Carl Reinecke | 1908 - 1909 | 2 | |
| The Interminable Suicide of Gregory Church | Daniel Kitson | 2011 | 1 | |
| Internal | Ontroerend Goed | 2011 - 2013 | 2 | |
| Internezzo: Four Orchestral Interludes from the Opera | Richard Strauss | 2015 | 1 | |
| Interplay | Willy Young | 1975 | 1 | |
| Interrogation of Angel | Barry Dickins | 1981 | 1 | |
| Intertwining Monologue | Steven Hopley | 2011 | 1 | |
| Interval | Sumner Locke Elliott | 1939 - 1943 | 6 | 5 |
| Intervals | Lloyd Jones | 2010 | 1 | |
| The Interview | Matt O'Reilly | 1974 - 2010 | 6 | |
| An Interview | David Mamet | 1997 | 2 | |
| Interview | Jean-Claude van Itallie | 1972 - 1979 | 2 | |
| The Interview | Barry Dickins | 1977 | 1 | |
| Interview | Harold Pinter | 1963 | 1 | |
| Intimacy | Adriano Cortese, Beth Buchanan, Patrick Moffatt, Paul Lum, Raimondo Cortese, Ranters Theatre | 2010 - 2022 | 3 | 1 |
| Intimate Exchanges | Alan Ayckbourn | 1991 - 2007 | 2 | |
| An Intimate Revue | Doris Fitton, The Independent Theatre | 1936 | 1 | |
| Intimate Space | Restless Dance Theatre | 2017 | 1 | |
| Into the Light | Edmund Barclay | 1938 | 1 | |
| Into the Shimmering World | Angus Cerini | 2024 | 1 | |
| Into the Woods | Melanie Lane | 2022 | 1 | |
| Into The Woods | James Lapine, Stephen Sondheim | 1992 - 2024 | 59 | |
| Into White | Amanda Price | |||
| Intrada from Dies Natalis | Gerald Finzi | 1997 | 1 | |
| Intrigue | Harry Tighe | 1941 | 1 | 3 |
| The Intrigue | 1835 - 1871 | 5 | ||
| Intrigue; or, Married Yesterday | John Poole | 1858 - 1934 | 3 | |
| Intrigued Currents | Aida Amirkhanian | 1988 | 1 | |
| The Intriguing Case of the Silent Forest | Matthew Crosby | 2019 | 1 | |
| Introduction and Allegro for Strings, Op. 47 | Edward Elgar | 1985 - 1997 | 6 | |
| Introduction and Allegro, M. 46 | Maurice Ravel | 1955 - 2004 | 2 | |
| Introduction and Fugue | Julius Reubke | 1953 | 1 | |
| Introduction and Passacaglia for Organ in D Minor | Max Reger | 1918 | 1 | |
| Introduction and Polonaise Brillante, Op. 3 | Frederic Chopin | 1900 - 1910 | 3 | |
| Introduction and Rondo Capriccioso in A Minor, Op. 28 | Camille Saint-Saens | 1906 - 2006 | 12 | |
| Introduction and Tocata | William Walond | 1953 | 1 | |
| Introduction Teatrali No. 1 in D-Major Op. 4 | Pietro Locatelli | 1996 | 2 | |
| Introduction, Passacaglia and Fugue B149 | Healy Willan | 2023 | 1 | |
| Introduction, Theme and Variations in E-Flat Major | Gioacchino Rossini | 1998 | 1 | |
| Introductions and Goodbyes | Lucas Foss | 1974 - 2023 | 2 | |
| Intruder | Maurice Maeterlinck | 1988 - 2005 | 4 | |
| The Intruders | Mac Luker | 1935 | 1 | 1 |
| Intruders | Abe Pogos | 1989 | 1 | |
| Intrugued Currents | Aida Amirkhanian | |||
| Invaders | Greg McCart | 1988 | 1 | |
| Invasion From a Planet With No Special Effects | Brett Danalake | 2001 | 1 | |
| The Invention of Fire | Darragh Martin | 2012 | 1 | |
| Invercargill | 2003 | 1 | ||
| Invictus | Bruno Huhn | 1912 - 1916 | 2 | |
| Invidu | Robert Kitchell, Rod Garton | 2001 | 1 | |
| The Invincibles | Thomas Morton | 1837 | 1 | |
| Invisible Atom | Anthony Black, 2b Theatre Company | 2011 - 2013 | 3 | |
| Invisible Circus | Sumner Locke Elliott | 1946 - 1992 | 4 | 3 |
| The Invisible Foe | Walter Hackett | 1918 | 1 | |
| The Invisible Prince; Or, the Island of Tranquil Delights | 1870 | 3 | ||
| The Invitation | Kenneth MacMillan | 1971 | 1 | |
| Invitation to a March | Arthur Laurents | 1965 | 1 | |
| Invocation | Frederick Corder | 1907 - 1909 | 2 |