Chapter Seven: The Lost Sister - S2-E7
Corrected entry: When Kali and her crew arrive at the station to "stock up", she tells the guy that his bathroom is leaking and we see the first shot of the door with water on the floor but when the cashier runs into the bathroom, the water is gone with no stains. (00:25:07)
Chapter Nine: The Piggyback - S4-E9
Corrected entry: Stranger Things season 4 vol 1 confirms upside down is locked in 1983 as Nancy's guns aren't there. Her diary entry shows it to be Nov 1983. Yet in season 4 vol 2 Ed Munson's guitar is there. This implies he either was playing guitar back then or they've made a deliberate mistake here but it's caused an error in the 'stuck in 1983' story.
Chapter Six: E Pluribus Unum - S3-E6
Corrected entry: Lucky Charms didn't add rainbows until 1992. (00:37:00)
Correction: The lucky charms box didn't have rainbows, like the marshmallow, it was the background of the box that made her have a flashback.
Correction: To clarify the other correction, there is a rainbow on the box, but not the rainbow marshmallow. In fact, the box seen is from a 1985 limited edition Lucky Charms box where the marshmallow colors were mixed up. In real life, that box did have a rainbow on it. Season 3 is set in 1985.
Corrected entry: Kentucky Fried Chicken did not adopt the KFC logo until the 1990's. They would not have had a KFC logo on their bucket and probably would not have referred to loving KFC.
Correction: The bucket has the correct Kentucky Fried Chicken logo, it does not say KFC. However, Steve does say he loves "KFC." However, a lot of people were calling it KFC before the company officially took on the name in 1991. It's not hard to imagine Steve using the initials in 1984.
Chapter Two: The Weirdo on Maple Street - S1-E2
Corrected entry: When Nancy wakes up at Steve's house, the window shows light outside, but when Nancy goes outside it's nighttime.
Chapter Five: The Flayed - S3-E5
Corrected entry: When Steve Harrington knocks out of the soldier, Dustin congratulations him. Over Dustin's left shoulder there's a black silhouette of a crew member hiding in plain sight. (00:36:50)
Correction: Actually that's Robin's reflection. You see the mouth closing at the same time.
Chapter Five: The Flea and the Acrobat - S1-E5
Corrected entry: Right after Lucas gets up after 11 knocks him into the wall, as he storms off Dustin grabs Mike to keep him from chasing after Lucas and says "Finn, let him go". He called him by the actor's real name instead of his character's name. (00:44:35)
Corrected entry: Some of the cars in the background have a raised brake light. The third brake light in cars was added in 1986.
Correction: Third brake lights were made a legal requirement in cars in 1986, however they were found in some cars prior.
Chapter Two: The Weirdo on Maple Street - S1-E2
Corrected entry: When Nancy wakes up after sleeping with Steve (after Barb's death) outside the window alludes to it being morning/daytime. When Nancy steps outside we see that it is still night out.
Correction: When Barb is sitting on the diving board as well as the 'party' scene, the audience can see that the pool is brightly lit up with bright lights. You may have mistaken the lights to be sunlight.
Correction: Kali used her power to make the cashier think that the bathroom was leaking. Kali's power allows her to make people see things that aren't really there.