Re: the literature/sources that "Alien" (1979) borrowed from
I recall something on the Alien DVDs where O'Bannon cheerfully acknowledges a kind of Lovecraftian influence on the alien monster. Certainly, Geiger, who designed the Alien, was a fan of Lovecraft (he had an art book titled the Necromonicon).
'Spock is always right, even when he's wrong. It's the tone of voice, the supernatural reasonability; this is not a man like us; this is a god.'
- Philip K. Dick