So it's about this obnoxious, two-dimensional, wise-ass American backpacker with mommy issues and financial difficulties, that just so happens to find a quick buck testing at "top secret" British horror video game company to finance a trip home. But things aren't what they seeeem. This one lulls you into a false sense of security before doling out some real nightmare fuel in the latter half, so stick around… or not.
The episode required a lot of build-up until the frightening part began, but then the scares just started rolling in and things got pretty intense. I really liked the final twist, the analogy with Alzheimer's decease and, if the leading man was a touch more relatable, we would feel more sorry for him in the end. But overall a solid episode... I like when "Black Mirror" plunges into suspense/horror territory.