Alien is the first movie of one of the most popular sagas in science fiction history, and introduces Sigourney Weaver as Ripley, the iron-willed woman destined to battle the galaxy's ultimate creature. The terror begin when the crew of the spaceship Nostromo investigates a transmission from a desolate planet and makes a horrifying discovery - a life form that breeds within a human host. Now the crew must fight now only for its survival, but for the survival of all mankind.

The UHD has the following:  
 
Directors cut 2003:

• 2003 Audio Commentary by Ridley Scott and the Cast and Crew

 
Theatrical Version 1979

• 1999 Audio Commentary by Ridley Scott [1979 Theatrical Version Only]
• Final Theatrical Isolated Score 5.1 Dolby Digital [1979 Theatrical Version Only]
• Composer's Original Isolated Score 5.1 Dolby Digital [1979 Theatrical Version Only]

Deleted Scenes