List of science fiction television programs, L

This is an inclusive list of science fiction television programs whose names begin with the letter L.

L
Live-action
 * L5: First City in Space (1996, docufiction)
 * Lab Rats (2012–2016)
 * Lab Rats: Elite Force (2016)
 * Land of the Giants (1968–1970)
 * Land of the Lost (franchise):
 * Land of the Lost (1974–1976)
 * Land of the Lost (1991–1992, Land of the Lost remake)
 * Langoliers, The (1995, miniseries)
 * Last Dinosaur, The (1977, Japan/US, film)
 * Last Exile (franchise):
 * Last Man on Planet Earth, The (1999, film)
 * Last Train, The (1999, UK)
 * Lathe of Heaven, The (1979, film)
 * Lavender Castle (1999–2000, UK, stop-motion animation)
 * Legacy of the Silver Shadow (2002, Australia)
 * Legend (1995)
 * Legend of Death (1965, UK)
 * Legends of the Superheroes (1979)
 * Legends of Tomorrow (2016–2022)
 * Level 9 (2000–2001)
 * Lexx (1997–2002, Canada/UK/Germany)
 * Life Force (2000, UK)
 * Life on Mars (franchise):
 * Life on Mars (2006–2007, UK)
 * Life on Mars (2008–2009, US, Life on Mars remake)
 * Ashes to Ashes (2008–2010, UK, Life on Mars sequel)
 * Chica de Ayer, La aka Girl from Yesterday, The (2009, Spain, Life on Mars remake)
 * Lifepod (1993, film)
 * Logan's Run (1977–1978)
 * Lost (2004–2010)
 * Lost Future, The (2010, film)
 * Lost in Space (franchise)
 * Lost in Space (1965–1968)
 * Lost in Space (2018-2021)
 * Lost Room, The (2006, miniseries)
 * Lost Saucer, The (1975–1976)
 * Lost Signs aka Mystère (2007, France, miniseries)
 * Lost World, The (2001, film)
 * Lottery, The (2014)
 * Love War, The (1970, film)
 * Luna (1983–1984, UK)

Animation
 * Lampies, The (2001–2002, UK, animated)
 * Last Exile (2003, Japan, animated)
 * Last Exile: Fam, the Silver Wing (2011, Japan, animated, Last Exile sequel)
 * Lazer Tag Academy (1986, animated)
 * League of Super Evil aka L.O.S.E. (2009–2012, Canada, animated)
 * Legend of the Galactic Heroes: Die Neue These (2018, Japan, animated)
 * Legion of Super Heroes (2006–2008, animated)
 * Lensman: Power of the Lens (1984–1985, Japan, animated)
 * Lightspeed Electroid Albegas (1983–1984, Japan, animated)
 * Lilo & Stitch (franchise):
 * Lilo & Stitch: The Series (2003–2006, animated)
 * Stitch! (2008–2011, Japan, animated)
 * Stitch & Ai (2017, China, animated)
 * Lloyd in Space (2001–2004, animated)
 * Loonatics Unleashed (2004–2007, animated)
 * Lost Universe (1998, Japan, animated)
 * Love, Death & Robots (2019–present, anthology, animated)