De regreso a la Tierra, la nave de carga Nostromo interrumpe su viaje y despierta a sus siete tripulantes. El ordenador central, MADRE, ha detectado la misteriosa transmisión de una forma de vida desconocida, procedente de un planeta cercano aparentemente deshabitado. La nave se dirige entonces al extraño planeta para investigar el origen de la comunicación.
Main Title — Alex North & Jerry Goldsmith & National Philharmonic Orchestra
Hyper Sleep — Jerry Goldsmith, National Philharmonic Orchestra
The Landing — Jerry Goldsmith, National Philharmonic Orchestra
The Terrain — Jerry Goldsmith, National Philharmonic Orchestra
The Craft — Jerry Goldsmith, National Philharmonic Orchestra
The Passage — Jerry Goldsmith, National Philharmonic Orchestra
The Skeleton — Jerry Goldsmith, National Philharmonic Orchestra
A New Face — Jerry Goldsmith, National Philharmonic Orchestra
Hanging On — Jerry Goldsmith, National Philharmonic Orchestra
The Lab — Jerry Goldsmith, National Philharmonic Orchestra
Drop Out — Jerry Goldsmith, National Philharmonic Orchestra
Nothing To Say — Jerry Goldsmith, National Philharmonic Orchestra
Cat Nip — Jerry Goldsmith, National Philharmonic Orchestra
Here Kitty — Jerry Goldsmith, National Philharmonic Orchestra
The Shaft — Jerry Goldsmith, National Philharmonic Orchestra
It's A Droid — Jerry Goldsmith, National Philharmonic Orchestra
Parker's Death — Jerry Goldsmith, National Philharmonic Orchestra
The Eggs — Jerry Goldsmith, National Philharmonic Orchestra
Sleepy Alien — Jerry Goldsmith, National Philharmonic Orchestra
To Sleep — Jerry Goldsmith, National Philharmonic Orchestra
The Cupboard — Jerry Goldsmith, National Philharmonic Orchestra
Out The Door — Jerry Goldsmith, National Philharmonic Orchestra
End Title — Jerry Goldsmith, National Philharmonic Orchestra
The Face Hugger — Jerry Goldsmith, National Philharmonic Orchestra
Breakaway — Jerry Goldsmith, National Philharmonic Orchestra
Acid Test — Jerry Goldsmith, National Philharmonic Orchestra
The Recovery — Jerry Goldsmith, National Philharmonic Orchestra
The Alien Planet — Jerry Goldsmith, National Philharmonic Orchestra
Eine Kleine Nactmusik — Mozart
Symphony No. 2, Op. 30 "Romantic": I. Adagio - Allegro moderato — Eastman-Rochester Orchestra & Howard Hanson