Agree with top two positions,both are superb and changed sci-fi.However Alien the first is the best of that story line,all the rest are very good re-interpretations.Stars Wars,another first in a long line,deserverves to be there.It repopularized sci-fi,and whether or not you enjoyed Lucas's sequels,it stands above remakes like Fly and Solaris and feel good jaunts like E.T. and Back to the Future.The best sci-fi doesnt age Blade Runner,Alien,2001 are still on TV (here in NZ) and almost every sci-fi film/TV show and Cruise/Will Smith vehicle borrows from them.Surprized original Terminator didn't get a spot,maybe an an anti-Arnie bias?Or 80s interpretation of Orwells 1984,too British?Eraserhead,too wierd?Yes its all a matter of opinion,I prefer sci-fi that is darker,rather than moralistic.Obviously advances in CGI etc have made sci-fi more accessible and flashy but alot are now remakes of 50s and 60s stories.Sci-fi in general owes alot to small group of authors Phillip K Dick,Arthur C Clark,Assinov(?),Orwell and a few others Im struggling to spell.Their is a plethora of producers,screenwriters scouring bargain bins in book stores at this very moment,searching for something new to pitch to Hollywood.
Iv seen things you people wouldn't believe attack ships on fire off the shoulder of Orion i watched C beams glitter in the dark near the Tannhauser gate all those moments will be lost in time like tears in the rain. time to die. what more can you say brilliant !!!!!!!