Is there anything more terrifying than a closed door in Zombicide: Black Plague?

What horrors lie behind it?
What is that gurgling noise it's barely muffling?

The 3D Doors Pack contains 27 doors with 3 different designs to keep players' adventures looking fresh. Containing more doors than required in the base game, players get a variety to keep them stocked up for future expansions. The doors don't just stand upright creating a visual barrier on the board, they'll also swing open when Survivors have gained access to the other side!