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

U

Live-action

• UFO (1970–1971, UK)
• Ultra Series (franchise):
  • Ultra Q (1966, Japan)
  • Ultraman (1966–1967, Japan)
  • Ultra Seven (1967–1968, Japan)
  • Ultra Fight (1970–1971, Japan)
  • Return of Ultraman, The (1971–1972, Japan)
  • Ultraman Ace (1972–1973, Japan)
  • Ultraman Taro (1973–1974, Japan)
  • Ultraman Leo (1974–1975, Japan)
  • Ultraman 80 (1980–1981, Japan)
  • Ultraman: Towards the Future (1992, Australia/Japan)
  • Ultraman vs. Kamen Rider (1993, Japan, special)
  • Heisei Ultra Seven (1994, Japan)
  • Ultraman: The Ultimate Hero (1995, US/Japan)
  • Ultraman Tiga (1996–1997, Japan)
  • Ultraman Dyna (1997–1998, Japan)
  • Ultraman Gaia (1998–1999, Japan)
  • Ultraman Nice (1999–2000, Japan)
  • Ultraman Cosmos (2001–2002, Japan)
  • Ultra Q: Dark Fantasy (2004, Japan)
  • Ultraman Nexus (2004–2005, Japan)
  • Ultraman Max (2005–2006, Japan)
  • Ultraman Mebius (2006–2007, Japan)
  • Ultraseven X (2007, Japan)
  • Ultra Galaxy Mega Monster Battle (2007–2008, Japan)
  • Ultra Galaxy Mega Monster Battle: Never Ending Odyssey (2008–2009, Japan)
  • Neo Ultra Q (2013, Japan)
  • Ultraman Ginga (2013, Japan)
  • Ultraman Ginga S (2014, Japan)
  • Ultraman X (2015, Japan)
  • Ultraman Orb (2016, Japan)
• Ultraviolet (1998, UK) (elements of science fiction)
• Undermind (1965)
• Under the Dome (2013–2015)
• Under the Mountain (1981–1982, New Zealand, miniseries)
• Unforeseen, The (1960, UK, anthology) IMDb
• Uninvited, The (1997, UK)
• Unnatural History (2010, US/Canada, anthology) (elements of science fiction in some episodes)
• Urban Gothic (2000) (elements of science fiction in some episodes)
• UpGrade: The Web Series
• Utopia Falls (2020)

Animated

• UFO Warrior Dai Apolon (1976–1977, Japan, animated)
• Ultraman, The (1979–1980, Japan, animated)
• Ultraforce (1995, animated)
• Ulysses 31 aka Space Legend Ulysses 31 (Japan) (1981–1982, France/Japan, animated)
• Underdog (1964–1973, animated)
• URBO: The Adventures of Pax Afrika (2006, South Africa, animated)