Series with the first letter - "T"
- 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–…)
- The Loretta Young Show (1953–1961)
- The Lost Room (2006)
- The Lost Symbol (2021–…)
- The Lottery (2014)
- The Loud House (2016–…)
- The Loudest Voice (2019)
- The Love Boat (1977–1987)
- The Love You Give Me (2023–…)
- The Low Tone Club (2022–…)
- The Lørenskog Disappearance (2021)
- The Lucy Show (1962–1968)
- The Luminaries (2020–…)
- The Lying Game (2011–2013)
- The Lying Life of Adults (2023–…)
- The Madame Blanc Mysteries (2021–…)
- The Magic School Bus (1994–1997)
- The Magical World of Disney (1954–1991)
- The Magicians (2015–…)
- The Magnificent Seven (1998–2000)
- The Makanai: Cooking for the Maiko House (2023–…)
- The Making of the Mob (2015–…)
- The Mallorca Files (2019–…)
- The Man from U.N.C.L.E. (1964–1968)
- The Man in the High Castle (2015–…)