Series with the first letter - "T"
- The Leftovers (2014–2017)
- The Legacy of Black Wall Street (2021)
- The Legend of Chusen (2016)
- The Legend of Hanuman (2021–…)
- The Legend of Korra (2012–2014)
- The Legend of Prince Valiant (1991–1994)
- The Legend of Vox Machina (2022–…)
- The Legends of King Arthur (2001–…)
- The Letdown (2017–…)
- The Letter for the King (2020–…)
- The Liar and His Lover (2017)
- The Librarians (2014–2018)
- The Lies Within (2019–…)
- The Life & Times of Tim (2008–2012)
- The Life and Legend of Wyatt Earp (1955–1961)
- The Life of Birds (1998)
- The Lincoln Lawyer (2022–…)
- The Line (2021–…)
- The Lion Guard (2016–…)
- The Listener (2009–2014)
- The Little Drummer Girl (2018–…)
- The Living and the Dead (2016)
- The Living Planet (1984–…)
- The Loch (2017)
- The Lone Gunmen (2001–…)
- The Long Call (2021–…)
- The Longest Night (2022–…)
- The Looming Tower (2018)
- The Looney Tunes Show (2011–2014)
- The Lord of the Rings: The Rings of Power (2022–…)