Stranger Things: 15 Stupid Mistakes You Completely Missed

15. An Out-Of-Time Demogorgon

Stranger Things owes so much of its mythology to Dungeons & Dragons. Though it's certainly all original storytelling, it leans on the kids' passion for the game - so much so that its primary antagonists are named after D&D monsters.

This was clear from the very first episode, as it introduced us to the concept of the Demogorgon through a game of D&D between the foursome, as Mike theatrically placed the figurine of the multi-headed creature on the board and announced its arrival - frightening Will, Dustin and Lucas.

The problem, however, lies in the fact that this particular Demogorgon figurine wasn't actually in existence until 1984 - a year after the first season was set.

Hardly a major issue - and one that non die-hard D&D fans probably didn't notice, but it's a rare anachronism for the Netflix series - and it's not the only one...