3 links
Allscifi Plan 9 Spotlight
allscifi.com
Very detailed analysis of the movie, and listings of similar films. Sign up to become a movie scholar on the site.
Bad Movies: Plan 9 from Outer Space
badmovies.org
Review, plot summary, stills, audio clips, and a video clip.
IMDb - Plan 9 from Outer Space (1958)
us.imdb.com
Cast/credits plus additional information about the film