The episode is about the dark and tricky adaptation of a fictional book called Bandersnatch (written by fictional author Jerome F Davies) into a video game by a group of software developers back in the 80s. There are several different endings and paths for the viewer to choose using the remote control's left, right and select buttons.

Doors are locked to the store that appeared over night and is sandwiched between a Nando's and Holy Moly Macaroni. Peeking inside you can make out what appears to be a retro Atari 2600 playing an 80s platform game at the back of the store.

A stand of Black Mirror videos in VHS format sits opposite a row of vinyl LPs, one of which is called Lock Door, Get Key, another fictional title from Bandersnatch. Kajagoogoo also appear. The Tuckersoft logo features throughout.