A spinoff in television is a new series containing characters or settings that originated in a previous series, but with a different focus, tone, or theme. For example, the series Frasier was a spinoff of the earlier series Cheers: the character Frasier Crane was introduced as a secondary character on Cheers, and became the protagonist of his own series, set in a different city, in the spinoff. Spinoffs are particularly common in sitcom. A related phenomenon, not to be confused with the spinoff, is the crossover.

Some spinoffs are "engineered" to introduce a new character on the original television series, just so that that character can anchor the new spinoff – that episode of the original series is often known as a "backdoor pilot". For example, the character Avery Ryan appeared in two episodes of the Las Vegas-based CSI: Crime Scene Investigation before the premiere of CSI: Cyber.

A revival, a later remake of a preexisting show, is not a spinoff. This is the case in Doctor Who, where the 2005 series which begins with a new Doctor but maintains the existing continuity. An exception to this rule can be made to series such as The Transformers where the lines of continuity are blurred. If a television pilot was written but never shot, it is not considered a spinoff. When a show undergoes a name change, it is not necessarily a spinoff.

Neither is a reboot series, a term recently invented for motion pictures, which can also occur in television (e.g. The Battlestar Galactica series of 2003 is a reboot, not a spinoff of the 1978 version). This is distinct from a revival in that there is little or no attempt to retain continuity, or casting, with the original. A recent example is the 1987 series Beauty and the Beast, rebooted as the 2012 The CW television series Beauty & the Beast, which keeps only the main premise of a female law enforcement official aided by a man-beast, the New York City locale, and the names of the two main characters. The CW's Beauty & the Beast was later rebooted again as a Max series starting in 2023.

NBC's Law & Order: Special Victims Unit (1999–present), which is the spinoff of NBC's Law & Order (1990–2010; 2022–present), is the longest-running spinoff series in American TV history; its 27th season premiered on September 25, 2025.

The following is an alphabetical list of television spinoffs by their respective parent series. __NOTOC__

Parent series Spinoff series 9-1-1 (2018–present) 9-1-1: Lone Star (2020–2025) 9-1-1: Nashville (2025–present) 19 Kids and Counting (2008–2015) United Bates of America (2012) Jill and Jessa: Counting On (2015) 7 vidas (1999–2006) Aída (2005–2014) 77 Sunset Strip (1958–1964) Bourbon Street Beat (1959–1960) 16 and Pregnant (2009–2021) Teen Mom (2009–2021) Teen Mom 2 (2011–2022) Teen Mom 3 (2013) 60 Minutes (1968–present) 60 Minutes II (1999–2005)60 Minutes+ (2022) 39 and a Half (2008–2009) 39 and Half Weeks (2019) The 20th Century Fox Hour (1955–1957) Broken Arrow (1956–1958) 21 Jump Street (1987–1991) Booker (1989–1990) 24 (2001–2010, 2014) 24: Legacy (2017) No. 73 (1982–1988) 7T3 (1988)

A Parent series Spinoff series A for Andromeda (1961) The Andromeda Breakthrough (1962) The Abbott and Costello Show (1952–1954) The Abbott and Costello Cartoon Show (1967–1968) Absolutely (1989–1993) Mr Don & Mr George (1993) Adam-12 (1968–1975) Emergency! (1972–1979) The Adventures of Batman (1968–1969) The New Adventures of Batman (1977) The Adventures of Black Beauty (1972–1974) The New Adventures of Black Beauty (1990–1992) The Adventures of Hutch the Honeybee (1979–1971) New Honeybee Hutch (1974) The Adventures of Jimmy Neutron, Boy Genius (2002–2006) Planet Sheen (2010–2013) The Adventures of Ozzie and Harriet (1952–1966) Ozzie's Girls (1973–1974) Al ritmo de la noche (1996-1999) Cero en conducta (1999–2002) Humor es...los comediantes (1999–2001) La escuelita VIP (2003–2004) ALF (1986–1990) ALF: The Animated Series (1987–1989) ALF Tales (1988–1989) ALF's Hit Talk Show (2004) Alice (1976–1985) Flo (1980–1981) All American (2018–present) All American: Homecoming (2022–2024) All in the Family (1971–1979) Maude (1972–1978) The Jeffersons (1975–1985) Archie Bunker's Place (1979–1983) Gloria (1982–1983) 704 Hauser (1994) The All New Popeye Hour (1978–1982) Popeye and Son (1987) All Over the Place (2011–present) All Over the Workplace (2016–2017) The All Star Comedy Show (2004) Monkey Trousers (2005) All That (1994–2005; 2019–2020) KaBlam! (1996–2000) Kenan & Kel (1996–2000) The Amanda Show (1999–2002) The Nick Cannon Show (2002–2003) Zoey 101 (2005–2008) Just Jordan (2007–2008) All the Rivers Run (1983) All the Rivers Run II (1990) Ally McBeal (1997–2002) Ally (1999–2000) Alphablocks (2011–present) Numberblocks (2017–present) The Alvin Show (1961–1962) Alvin and the Chipmunks (1983–1986) The Amanda Show (1999–2002) Moody's Point (2000–2002) Drake & Josh (2004–2007) The Amazing Adventures of Morph (1980–1981) The Morph Files (1996) Amazing Stories (1985–1987) Family Dog (1993) American Chopper (2003–2020) American Chopper: Senior vs. Junior (2010) Orange County Choppers (2013) America's Funniest Home Videos (1989–present) America's Funniest People (1990–1994) America's Funniest Home Videos: Animal Edition (2021–2022) America's Got Talent (2006–present) America's Got Talent: The Champions (2019–2020) American Horror Story (2011–present) American Horror Stories (2021–2024) American Idol (2002–2016; 2018–present) American Juniors (2003) American Idol Extra (2006–2009) American Idol Rewind (2006–2010) Canadian Idol (2003–2008) Ándale! (1994–1996) La Güereja... y Algo Más (1998–1999) La Güereja de mi Vida (2000–2001) The Andy Griffith Show (1960–1968) Gomer Pyle, U.S.M.C. (1964–1969) Mayberry R.F.D. (1968–1971) Animaniacs (1993–1998) Pinky and the Brain (1995–1998) Anne of Green Gables (1972) Anne of Avonlea (1975) Anne of Green Gables (1979) Kon'nichiwa Anne: Before Green Gables (2009) Another World (1964–1999) Somerset (1970–1976) Texas (1980–1982) Ant & Dec's Saturday Night Takeaway (2002–2024) In for a Penny (2019–2024) The Apprentice (2004–2017) The Apprentice: Martha Stewart (2005) Donald J. Trump Presents The Ultimate Merger (2010) Aqua Teen Hunger Force (2000–2015) Soul Quest Overdrive (2011) The Archie Show (1968–1969) The Archie Comedy Hour (1969–1970) Archie's Funhouse (1970–1971) Archie's TV Funnies (1971–1973) Everything's Archie (1973–1974) The U.S. of Archie (1974–1976) The New Archie and Sabrina Hour (1977–1978) The New Archies (1987–1988) Archie's Weird Mysteries (1999–2000) The Archie Comedy Hour (1969–1970) Sabrina and the Groovie Goolies (1970) Archie's TV Funnies (1971) Fabulous Funnies (1978–1979) Are You Being Served? (1972–1985) Grace & Favour (1992–1993) Armchair Theatre (1956–1974) Armchair Mystery Theatre (1960) Out of This World (1962) Never Mind the Quality, Feel the Width (1967–1971) Callan (1967–1972) Armchair Thriller (1967, 1978–1981) Armchair 30 (1973) Armchair Cinema (1974–1975) The Army Game (1957–1961) Bootsie and Snudge (1960–1963) Around the World with Willy Fog (1984) Willy Fog 2 (1994–1995) Arrow (2012–2020) The Flash (2014–2023) Legends of Tomorrow (2016–2022) Batwoman (2019–2022) Arthur (1996–2022) Postcards from Buster (2004–2012) Arthur C. Clarke's Mysterious World (1980) Arthur C. Clarke's World of Strange Powers (1985) Arthur C. Clarke's Mysterious Universe (1994–1995) ASAP (1995–present) ASAP Fanatic (2004–2006) Ashita no Joe (1970–1971) Ashita no Joe 2 (1980–1981) As the World Turns (1956–2010) Our Private World (1965) Atashin'chi (2002–2009) Shin Atashin'chi (2015–2016) The Atom Ant/Secret Squirrel Show (1965–1967) Super Secret Secret Squirrel (1993–1995) The Avengers (1961–1969) The New Avengers (1976–1977)

B