Season 1
Season 2
Season 3
Season 4
Season 5
100

How does Will communicate with Joyce from the Upside Down?

Lights

100

Who is Joyce's new boyfriend?

Bob Newby

100

What's the name of Dustin's girlfriend?

Suzie

100

Who do the police think murdered the four teenagers?

Eddie

100

Who got powers at the end of volume 1?

Will Byers

200

Who does Nancy date?

Steve

200

What does Dustin name the creature he finds?

Dart/D'Artagnan

200

Who does Steve admit his love to at the end of the season?

Robin

200

What's the name of Johnathan's new friend?

Argyle

200

What was the name of the imaginary "friend" the children were seeing?

Mr. Whatsit

300

Where is Will's fake body discovered?

Quarry/Lake

300

How did Will communicate while the Mind Flayer was in his body?

Morse code
300

Why was Robin obsessed with Steve in high school? 

The girl she liked kept staring at him.
300

What was the name of the girl who El hit in the head with a rollerskate?

Angela

300

Who does Eleven find in the Upside Down at the end of the 1st volume?

Kali/008

400

How does the Demogorgon find Barb?

Blood

400

Which dance do they attend at the end of the season?

The Snow Ball

400

Who is Billy's first victim?

Heather

400

What was the criteria for being one of Vecna's targets?

Past trauma that makes you vulnerable

400

Why does Vecna only take children?

He believes they are weak and easily controllable

500

What road did Will go missing on?

Mirkwood

500

Which two characters dressed up as Venkman for Halloween?

Mike and Lucas

500

What is needed to open the Russian's safe?

Planck's constant

500

Who were all the four people that Vecna murdered/attempted to murder?

Chrissy, Fred, Patrick, and Max

500

How does Will get his powers?

He accepts his role as a vessel instead of fearing it