This is now Public Domain
This film is now in the Public Domain, and is available for a free and legal download at:
http://www.archive.org/details/Killers_from_space
It's also part of "50 Sci-Fi Classics", the 2005 Emson set that should be titled "50 Critically Panned Low-Budget Productions, Mostly Film and Not Necessarily Sci-Fi". These are the 1st DVDs I've bought that don't feature any warning against copying the contents; apparently every movie and TV show in this 5-DVD set is in the public domain. Of course, "Killers from Space" and the other featured movies aren't very good (plus Emson shoddily transferred them from videotape, with an extreme butchering of "Teenagers from Outer Space"!), which is typical for cinema that ended up in the public domain. You know, the only very good public-domain film I've ever seen is 1968 hit "Night of the Living Dead". And NOTLD is only public-domain because the filmmakers forgot to include a copyright notice; it really is the exception that proves the rule.
shareThere are a lot of good films in public domain; of course, it depends upon your definition of "good." If the only thing someone considers good is a gore flick, then it's probably kinda hard to track many down, since there wasn't much gore until relatively recently! (On the other hand, if you're referring to a movie's picture quality, NOTLD is probably way up there because it's such a recent picture and hasn't been through the wringer as many times as a lot of older pictures have.) Keep in mind, though, that age is a prime factor in a picture's entering p.d., which means we're talking about older flicks. If someone finds them "old-fashioned" or unentertaining then it's highly unlikely that he'll find any he considers good. (Plus, with only a handful of exceptions, science-fiction prior to "2001" was considered kid's stuff and studios didn't put any dough into it, so most of the ones that have gone p.d. are pretty bad, or at least obviously cheap; you can find a few really good old horror flicks, though, like "White Zombie.")
Bear in mind that copyrights are renewable after so many years (I'm not sure what the figure is now, the laws have been changed so much); it's only if you don't renew them (or do something dumb to blow it) that a picture goes p.d. early. If something seems like a valuable property, it's much less likely that the studio will let it go that easily. So we wind up with lots of "Killers from Space" clones...and no "Forbidden Planets!" Not until that second renewal expires in another thirty years or so!
Still, look hard enough and you'll find a lot of good movies in p.d., even if you can't necessarily find good copies of them! After all, "It's a Wonderful Life" was in public domain (heck, that's how it became popular in the first place)...until Republic Pictures and NBC managed some legal sleight of hand and put the genie back in the bottle! (A bottle which, technically, neither of them owned in the first place! I'm still a little confused about that!)
(By the way, I have tons of p.d. movies and collections, and I'm amused by how many of them STILL start out with that warning about "unauthorized duplication of copyrighted material...!" Just whose copyrighted material are they warning us about?)