Chapter Three: Evolution
The kids look for answers about the mutant creatures plaguing their town and get a helpful lesson from Mrs. Baxter, their substitute science teacher.
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More from this season
S1 E1
Chapter One: Welcome to Hawkins, New Kid
A surprising new threat alters the gang's plans to shovel snow for extra cash, bringing them face to face with danger and closer to a cool new student.
S1 E2
Chapter Two: Bad Harvest
Nikki joins the party — and the newly formed Hawkins Investigators Club. Strange things take root at a nearby farm and shake up the Winter Festival.
S1 E4
Chapter Four: The Confession
A worried Mike decides to come clean to Hopper, and Dustin drags Steve into the H.I.C. Nikki welcomes Will to the mosh pit. Lucas and Max hit the arcade.
S1 E5
Chapter Five: The Weekly Watcher
When a photo that could put El in danger gets sold to a popular tabloid, the kids pull Nancy into a heist to get it back. If they can't? It's game over.