d. Bruno VeSota (1958)
'A few weeks ago, Riverdale, Illinois was just another small, quiet town. But on that Saturday just after midnight, a living nightmare began'.
A 200 million year old race of hungry neon leeches land on on Earth with the idea that they are going to plug themselves in to the necks of human beings, operate them like mad puppets until they finish eating their brains, and then move on until the supply is extinguished. You can see what's in it for the leeches, but the Midwest natives are unconvinced, so eventually use science, a harpoon gun and several lives to zap the little bleeders into oblivion.
Not much happens, to be honest, but it's relatively well made and the alien's ship, a gleaming metallic cone of unknown material filled with a myriad of concentric tunnels, is interesting, as is the late appearance of the human manifestation of the malevolent hirundea, happily played by our old friend Leonard Nemoy (that's how it's spelled on the credits), wearing a silly Father Christmas beard to make him look older and wiser, his familiar features further obscured by odd lighting and a vaseline smeared lens. It's good to sort of see him.