one of my favorite B movies, due to the sheer outragenousness of the execution of it's concept. good and evil space brains coming to Earth? possessing both man and animal? everyone's favorite sci-fi hero, John Agar (how many genre movies did he make?)? it's just too cool.
and very memorable. I only ever saw the tail end of this one as a kid, and yet it stuck with me for years. I never knew the name of the movie was for many years, but I remembered that final scene clear as a bell. amazing how that can happen.