An alien on the Moon persuades an Earth boy to build a gadget, accidentally electrocuting the boy's father, who disbelieves the machine can work with no visible power-source. The alien telepathically communicates instructions to the thrilled boy, who's reluctant to be candid with his family, referring to the hideous creature merely as Mr. White, a handyman helping him with a basement science project.
https://www.imdb.com/title/tt0717037/plotsummary?ref_=tt_ov_pl
This video is in the Public Domain.
