Barbara’s car, one of the first victims of the Demogorgon in the first season, was not produced until 1988. The series is set in 1983, so that particular model did not exist back then.
The walkie-talkies used by the characters to communicate were not sold until 1985, two years after the series’ first season is supposed to start.
In the scene where Natalie argues with her mother and locks herself in her room, you can see how the bag she was carrying on her arm changes position from one second to the next.
The bus where the characters take refuge in season 1 is a Blue Bird TC 2000. This model was manufactured from 1998 to 2003, many years after the time in which the events take place.
When the kids are preparing to face the monster in season 1, you can see the school basketball court with a line marking three-point shots. However, this line officially came into use in 1987, not 1983.
In the second season, in the scene where Eleven and Hopper are having breakfast, the position of the actress and the elements on the table change between takes over and over again.
At the beginning of episode 5 of the second season, Will has a vision of the “other side” that wakes him up from his sleep, all agitated. In the same scene, you see his shirt go from entirely wet to dry several times.
When Will finds a creature in the bathroom, he runs out and drops his walkie-talkie, but when the others go in to get it, the device is gone.
In a scene from season three, set in 1985, Will offers as a peace offering to Eleven some of his M&M’S. You can briefly see that some of them are red. This is a historical error since Mars, the company that produces the candy, discontinued the red color in 1976 due to a controversy with the dye used, and only in 1987 did it return to production.
In season 3, when Alexei is running away from Hopper, you can see how the image was reversed; when he is running, the shirt pocket is on the right side, but when you see them from the front, the pocket changes to the left.
In season 3, when Robin and Erica are locked in a warehouse, they find a container with a mysterious substance. Robin takes it from Erica, and between shots, we see how the position of her hand changes over and over again.
When Steve is eating a banana in season 3, he throws the peel on the table, but seconds later, he has the banana back in his hand.
When they are sitting in the hospital waiting in season 3, Eleven tries to ignore Will, stops reading her magazine, and turns to the left. But in the next shot, she’s reading the magazine again, and she turns away from Will again.
In season 4, the main characters spend a day full of mixed feelings, but Will is the one who suffers the most. There’s this one scene that’s taking place on March 22, and if you recall from season 2, that’s Will’s birthday. Yet no one remembered! Even the producers of the series said that they totally missed it.
• Don't insult other visitors. Offensive comments will be deleted without warning.
• Comments are accepted in English only.
• No swearing words in comments, otherwise such comments will be censored.
• Your nickname and avatar are randomly selected. If you don't post comments for 7 days, they both are reset.
• To choose another avatar, click the ‘Random avatar’ link.
Well, yes and no. It's mostly things few would notice or know like the year a vending machine came into use, but too many continuation mistakes do get seen. At one point they would be distracting, at least for me.
Especially if it's about things like constantly changing in either wet and dry clothes in a scene.
Most movies and shows avoid these continuation errors by simply having someone take a few pics after a scene and keep track of it.
Not really too much trouble I'd think. They spend enough on detail to make it look like the 80's.
Why not spend a little more and make it all look right?