Chapter One: The Vanishing of Will Byers - S1-E1
Continuity mistake: When Will is being chased by the monster and runs into his garage, he pulls down his .22 rifle hanging on a wall rack. After he loads a few rounds aiming it at the door, the monster appears behind him. After Will and the monster disappear, the scene shows his rifle is back on the wall rack in its original spot. Did Will or the monster place it back on the wall rack while Will was being abducted? (00:07:25 - 00:08:10)
Continuity mistake: When Andrew and Ted are outside drinking beer, Andrew's beer bottle flips around in his hand between shots when he's sitting down.