Warning: Spoilers ahead for "Stranger Things" season two.
Netflix's breakout series "Stranger Things" has been captivating audiences with its numerous '80s movies references and stellar young cast since its debut in 2016.
For the actors, it was exactly a year between the start of filming on season one in November 2015 and returning for season two exactly one year later in 2016. About the same amount of time transpired for the characters between the seasons as well and it's pretty astounding how much had changed for them over the course of the show so far.
Let's take a look at how far Eleven, Mike, and the rest of the characters have come since we first saw them last year.
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Mike Wheeler was introduced as the de facto leader of his group — always coming up with plans and standing up for his friends.

Mike and his friends, who call themselves "the party" in reference to their Dungeons and Dragons campaigns, were the odd ones out in school. Mike was usually the one to stand up to the bullies or reassure his buddies when things were looking dire.
After meeting Eleven and then seemingly losing her, Mike spent much of season two in a much darker mindset.

At the start of season two, it's apparent that the events of the first season left Mike seemingly depressed and prone to acting out. He was heartbroken by Eleven's disappearance, but sprang back into old-Mike action when it became clear Will needed his help once more.
Eleven appeared on the first season as a scared but capable young girl with a very limited understanding of the world.

Though Eleven was a powerful child with psychic powers, she had been raised in abusive captivity and didn't know basic concepts like friendship, promises, or Eggo waffles. But when she met Mike and his friends, her entire world changed.
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