UFO (1970)

S1E26 The Long Sleep

After a decade in a coma, a woman awakens to recount her bizarre experience with aliens alongside her boyfriend during a drug-fueled adventure. They played games with the extraterrestrials, but tragedy strikes when her boyfriend seemingly plummets from a bridge or building, only to be taken by the aliens. Following her accident, she slips into a coma with fragmented memories. Now back and mysteriously revived by the aliens, her ex-boyfriend drugs her to extract information about a crucial component of a device. He then activates a thermo-chemical bomb that threatens to obliterate England when the four chemicals react in a central chamber.