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.

From the devestating to the surprisingly sweet, here are all the "Black Mirror" Season 7 episodes ranked from worst to best.

Black Mirror’s Plaything introduces a virtual pet game, Thronglets, that’s now real. What starts cute turns creepy as the pets multiply and start judging your every in-game decision.