Series with the first letter - "L"
- Last Chance U: Basketball (2021–…)
- Last King of the Cross (2022–…)
- Last Light (2022–…)
- Last Man Standing (2011–…)
- Last of the Summer Wine (1973–2010)
- Last Resort (2012–2013)
- Last Tango in Halifax (2012–…)
- Last Week Tonight with John Oliver (2014–…)
- Late Night Story (1978–1979)
- Late Night with Seth Meyers (2014–…)
- Laverne & Shirley (1976–1983)
- Law & Order (1990–2010)
- Law & Order True Crime (2017)
- Law & Order: Criminal Intent (2001–2011)
- Law & Order: LA (2010–2011)
- Law & Order: Organized Crime (2021–…)
- Law & Order: Special Victims Unit (1999–…)
- Law & Order: UK (2009–2014)
- Law of the Lawless (2002)
- Le Bureau des Légendes (2015–…)
- Le chevalier Tempête (1967–…)
- Le mystérieux docteur Cornélius (1984)
- Leah Remini: Scientology and the Aftermath (2016–…)
- Leave It to Beaver (1957–1963)
- Leaving (2012–…)
- Legacies (2018–…)
- Legend of the Seeker (2008–2010)
- Legend of the Superstition Mountains (2015–…)
- Legend of the Three Caballeros (2018)
- Legends (2014–2015)