| Work | Description | Characters |
|---|---|---|
| The Lightning Thief: The Percy Jackson Musical | 1 | |
| The Lion King | stage musical | 1 |
| The Lion King | 1994 American animated film | 8 |
| The Lion King | 2019 American musical film directed by Jon Favreau | 5 |
| The Lion King 1½ | 2004 animated comedy adventure film directed by Bradley Raymond, third and final installment in the Lion King trilogy | 4 |
| The Lion King II: Simba's Pride | 1998 American animated musical romantic comedy-drama film directed by Darrell Rooney | 5 |
| The Lion King: Simba's Mighty Adventure | 2000 video game | 2 |
| The Lion, the Witch, and the Wardrobe | children's fantasy novel by C. S. Lewis, 1950 | 2 |
| The Little Mermaid | 1989 American animated musical fantasy film produced by Walt Disney Feature Animation | 4 |
| The Living Daylights | 1987 spy film in the James Bond series directed by John Glen | 1 |
| The Lone Ranger | TV series | 1 |
| The Long Night | Book by Dean Wesley Smith and Kristine Kathryn Rusch, from 1996 | 7 |
| The Looking Glass War | 1965 spy novel by John le Carré | 1 |
| The Lord of the Rings | 1954–1955 fantasy novel trilogy by J. R. R. Tolkien | 29 |
| The Lord of the Rings: Gollum | 2023 video game developed by Daedalic Entertainment | 1 |
| The Lord of the Rings: The Fellowship of the Ring | 2001 film directed by Peter Jackson | 9 |
| The Lord of the Rings: The Return of the King | 2003 film directed by Peter Jackson | 20 |
| The Lord of the Rings: The Return of the King | video game | 1 |
| The Lord of the Rings: The Rings of Power | 2022 television series | 3 |
| The Lord of the Rings: The Two Towers | 2002 film directed by Peter Jackson | 10 |
| The Lord of the Rings: The Two Towers (video game) | video game | 1 |
| The Lost World: Jurassic Park | 1997 American science fiction action film directed by Steven Spielberg | 1 |
| The Lost Years | Book by Jeanne Kalogridis, from 1989 | 4 |
| The Magician King | book by Lev Grossman | 3 |
| The Magicians | 2015 American fantasy television series | 9 |
| The Magicians | 2009 fantasy novel by Lev Grossman | 5 |
| The Magician's Land | book by Lev Grossman | 4 |
| The Magician's Nephew | 1955 novel by C. S. Lewis | 2 |
| The Mandalorian | American space opera streaming television series | 4 |
| The Man from U.N.C.L.E. | 2015 film directed by Guy Ritchie | 1 |
| The Man from U.N.C.L.E. | 1960s American television series | 1 |
| The Manga Bible: From Genesis to Revelation | 1 | |
| The Man in the Brown Suit | novel by Agatha Christie | 1 |
| The Man Trap | 1966 episode of Star Trek: The Original Series (S1 E1) directed by Marc Daniels | 6 |
| The Man with the Golden Gun | 1974 film by Guy Hamilton | 1 |
| The Many Adventures of Winnie the Pooh | 1977 American animated musical film produced by Walt Disney Productions | 2 |
| The Maquis, Part I | episode of Star Trek: Deep Space Nine (S2 E20) | 5 |
| The Martian | 2015 film directed by Ridley Scott | 1 |
| The Martian | 2011 science fiction novel by Andy Weir | 1 |
| The Marvel Super Heroes | Television series featuring Marvel Comics characters | 4 |
| The Master and Margarita | 1994 film by Yuri Kara | 1 |
| The Master and Margarita | 1989 film by Maciej Wojtyszko | 1 |
| The Master and Margarita | novel by Mikhail Bulgakov | 2 |
| The Matrix | 1999 American science fiction action thriller film | 7 |
| The Matrix Online | video game | 1 |
| The Matrix: Path of Neo | video game | 3 |
| The Matrix Reloaded | 2003 film by The Wachowskis | 3 |
| The Matrix Revolutions | 2003 film by The Wachowskis | 3 |
| The Matrix trilogy | 1900–present films directed by The Wachowskis | 3 |
| The Melancholy of Haruhi Suzumiya | Japanese anime television series | 3 |
| The Mentalist | American crime drama television series starring Simon Baker (2008-2015) | 2 |
| The Merry Wives of Windsor | play written by Shakespeare | 1 |
| The Message | episode of Firefly (S1 E12) | 2 |
| The Middle | American sitcom television series (2009-2018) | 2 |
| The Midnight Line | Lee Child´s book | 1 |
| The Miser | 17th century French comedy by Molière | 1 |
| The Monkey King | 2001 American television mini-series directed by Peter MacDonald | 1 |
| The Monkey King | 2014 Hong Kong-Chinese fantasy film directed by Cheang Pou-soi | 1 |
| The Monkey King 2 | 2016 film by Cheang Pou-soi | 1 |
| The Monkey King 3 | 2018 film by Cheang Pou-soi | 1 |
| The Monkey King Conquers the Demon | 1984 Chinese animation film | 1 |
| The Monkey King: Quest for the Sutra | television series | 2 |
| The Moomins | Moomin (1982 TV series) | 1 |
| The Moon of Israel | 1924 film by Michael Curtiz | 1 |
| The Muppet Christmas Carol | 1992 film directed by Brian Henson | 1 |
| The Muppets | puppet characters created by Jim Henson | 1 |
| The Muppets | media franchise by The Jim Henson Company | 1 |
| The Muppet Show | American television series | 1 |
| The Murdered Sun | Book by Christie Golden, from 1996 | 6 |
| The Murder in the Honjin | 1973 novel by Seishi Yokomizo | 1 |
| The Murder of Roger Ackroyd | book | 1 |
| The Mysterious Affair at Styles | novel by Agatha Christie | 1 |
| The Mysterious Island | novel by Jules Verne | 1 |
| The Mystery of the Blue Train | novel by Agatha Christie | 1 |
| The Naked Time | episode of Star Trek: The Original Series (S1 E4) | 6 |
| The Nanny | US 1990s television series | 1 |
| The New Addams Family | American–Canadian situation comedy television series from 1998–1999 | 1 |
| The New Adventures of Batman | television series | 3 |
| The New Adventures of Superman | television series | 2 |
| The New Batman Adventures | American animated television series (1997–1999) | 10 |
| The New Batman/Superman Adventures | US animated television series | 1 |
| The New Deal Show | 1937 film by Dave Fleischer | 1 |
| The New Legends of Monkey | 2018 television series | 1 |
| The New Scooby-Doo Movies | American animated television series | 1 |
| The Newsroom | American television political drama series | 1 |
| The Night Before Christmas | 1905 film by Edwin Stanton Porter | 1 |
| The Nightmare Before Christmas | 1993 animated film directed by Henry Selick | 3 |
| The Nightmare Before Christmas: Oogie's Revenge | 2004 video game | 1 |
| The Nightmare Before Christmas: The Pumpkin King | 2005 video game | 1 |
| The North | episode of Avatar: The Last Airbender (S1 E7) | 1 |
| The Northman | 2022 film directed by Robert Eggers | 1 |
| The OA | American mystery drama web television series | 8 |
| The O.C. | 2003 American teen drama television series | 1 |
| The Office | American sitcom broadcast on NBC | 23 |
| The Office | British sitcom television series | 2 |
| Theogony | poem by Hesiod | 2 |
| The Old Man of the Mountain | 1933 film by Dave Fleischer | 1 |
| The Originals | 2013 American supernatural drama television series | 5 |
| The Other Half | comic book | 2 |
| The Other Wind | fantasy novel by Ursula K. Le Guin, 2001 | 2 |