This slightly ponderous late 50's sci-fi-horror schlock isn't entirely a loser. It's about a manned space rocket that crash lands in a remote area. A bunch of scientists go to investigate and discover that the astronaut is in some kind of coma; he's being kept alive by alien embryos that have been mysteriously implanted in him. Anyway, the title alien monster soon raises it's head causing general havoc, including partial head removal.
The main problem with the film is it's pacing. It takes quite a while for the Blood Beast to appear, and he really only comes into his own in the last 20 minutes or so. He is undoubtedly a completely ridiculous creation but that's really not a problem as he provides a fair amount of comic relief. At the end of the movie where we have the final stand-off and this ludicrous creature starts talking with the voice of the doctor he killed earlier, you will be doing well not to have a giggle. So too in the brilliant x-ray scene where we see the alien embryos floating about in the astronaut's body - it's just too funny for words.
But unfortunately, the fun moments in Night of the Blood Beast come too few and far between. If you're a 50's sci-fi nut though then it's well worth checking this one out. Just don't expect too much.