d. Ronald V. Ashcroft (1958)
A young, pouting woman with extraordinary eyebrows, dressed in a skin tight iridescent metal catsuit and shimmering with radiation, arrives from outer space on a mysterious mission. Finding herself in a secluded forest, she stalks towards the only occupied place for miles around, a cabin occupied by a geologist and his dog. On the way, she kills a fox, a snake, a black bear and the members of a criminal gang who have kidnapped an heiress. Her silvery fingers are deadly, and the merest touch from her means radium poisoning and instant destruction. It's a bad situation, especially as she seems unstoppable by conventional means, i.e. she is shot about thirty times and it makes no difference, but these are Americans, so they just keep on firing into her.
Eventually, the geologist is able to whip up a cocktail of acids that kill the murderous alien and dissolve her away, leaving behind nothing but a trail of animal and human corpses and a medallion that contains a message from the President of the United Federation of Planets (or something like that) saying hello to the Earth and asking if we need any help with anything. It seems the young woman was merely an galactic emissary on a good will mission, a revelation that makes no sense at all unless the President of the United Whatnot of Whatever is an idiot, as sending a kill crazy person dripping with death to the middle of nowhere with a message of interplanetary importance was always bound to end in abject and embarrassing failure.
Super cheap, majorly clunky, the film only really jerks into life when the shiny un-smiley alien psycho lady is on the prowl but that's okay, as she's on the prowl for fifty minutes of its sixty five minute running time.