Season 7 brought Black Mirror back to the storytelling that has always made it so compelling, telling a suite of sci-fi stories that run the gamut from bleak to heartwarming to melancholy. But while its individual tales are diverse,

I’ll always remember us this way, and that’s a threat.

Much of the tech that makes up the seventh season of “Black Mirror” boils down to a small device, no larger than a marble, being placed on the side of a character’s head and transporting them to a hyper-realistic, simulated landscape.