They were in a large control room of some sort, one without windows or doors.
The most painterly image in the show suggests a room without doors seen from above.
She sees everything, hiding away in her room without doors!
Only in the room without doors was she safe from them.
This is a chapel-shrine without doors dating from around 1900.
"Yet be certain, they will hear thee, so long as thou art without doors."
When production finally began, the still house was without doors and windows.
Lost in a building without doors - a building which I cannot see!
The rooms are quite small, but, even without doors, they offer some privacy.
Our scientists aren't used to living inside a steel box without doors or windows.