Season 1 ofStranger Thingswas basically shot in a bubble without much concern for leaks or paparazzi.
But all that has changed for season 2.
Adds Levy, We had no security protocols last season and we have extensive security protocols this season.

Credit: HBO; Netflix
I cant speak about what they are because then people could crack them.
We protect every story point, every page of every script.
Go toPEOPLE.com/PEN,or download the free app on your Smart TV, mobile and web devices.
Even the cast is cloaked in secrecy.
Now we have a code name [for the show], says Millie Bobby Brown who plays Eleven.
And now I have a code name!
Its this weird thing.
On the call sheets our names are across it and if we lose it, were dead.
But are you ever really dead onStranger Things?
For more onStranger Things 2, stay tuned toEW.comand pick up the latest issue ofEntertainment Weeklyon stands now.
Stranger Things 2returns on Halloween.