I think I would've done a lot better in 10th grade Chemistry if we'd studied the Periodic Table of Sci-Fi Film and Television. And I get the feeling I'm not the only one. Click to biggie-size.
Excellent chart. ET but no Close Encounters of the the 3rd Kind? (I'm watching it right now).
At a quick glance, also among the missing:
Clash of the Titans
Land of the Giants
Alien Nation (The series)
Time Cop (movie and series)