USA

• 
  *

  Under Siege

  (1992)
• 
  *

  Under Siege 2: Dark Territory

  (1995)
• 
  *

  Under the Gun

  (1951)
• 
  *

  Under the Skin

  (2013)
• 
  ***

  Undercover Girl

  (1950)
• 
  ***

  The Undercover Man

  (1949)
• 
  **

  Undercurrent

  (1946)
• 
  *

  Underground

  (1970)
• 
  *

  The Underneath

  (1995)
• 
  *

  Undersea Girl

  (1957)
• 
  ***

  The Undertaker and His Pals

  (1966)
• 
  ***

  Undertow

  (1949)
• 
  ***

  The Underwater City

  (1962)
• 
  *

  Underworld

  (2003)
• 
  **

  The Underworld Story

  (1950)
• 
  ***

  Underworld U.S.A.

  (1961)
• 
  *

  Underworld: Awakening

  (2012)
• 
  *

  Underworld: Blood Wars

  (2016)
• 
  *

  Underworld: Evolution

  (2006)
• 
  *

  Underworld: Rise of the Lycans

  (2009)
• 
  ***

  The Undying Monster

  (1942)
• 
  **

  The Unearthly

  (1957)
• 
  ***

  Unfaithful

  (2002)
• 
  **

  The Unfaithful

  (1947)
• 
  ****

  Unforgiven

  (1992)
• 
  ***

  The Unforgiven

  (1960)
• 
  ***

  The Unguarded Moment

  (1956)
• 
  **

  The Unholy Rollers

  (1972)
• 
  ***

  The Unholy

  (1988)
• 
  *

  Unidentified Flying Objects: The True Story of Flying Saucers

  (1956)
• 
  ***

  Uninvited

  (1988)
• 
  ***

  The Uninvited

  (1944)
• 
  ***

  Union Station

  (1950)
• 
  **

  Unknown Island

  (1948)
• 
  *

  The Unknown Man

  (1951)
• 
  *

  Unknown Powers

  (1978)
• 
  ***

  The Unknown Terror

  (1957)
• 
  ***

  Unknown World

  (1951)
• 
  *

  The Unknown

  (1946)
• 
  ***

  The Unknown

  (1927)
• 
  *

  An Unmarried Woman

  (1978)
• 
  ***

  The Unseen

  (1980)
• 
  ***

  The Unseen

  (1945)
• 
  *

  Unstoppable

  (2010)
• 
  *

  The Unsuspected

  (1947)
• 
  *

  Untamed Fury

  (1947)
• 
  *

  Untamed Mistress

  (1956)
• 
  *

  Untamed Women

  (1952)
• 
  *

  Untamed Youth

  (1957)
• 
  ****

  The Untouchables

  (1987)

50 titles