blind door

The barricades bothered him, but he mounted them all, and began an emergency pound on the forbidding blind door.

Then, for the first time, he remembered that he had not told her of the blind door between himself and the other years.

He camped that night at the base of the Wall where the blind door entered, made his bed just inside the dead black passage, and watched while Banner, weary and still weak, slept in his blankets beside him.

It's a blind door; don't show on the other side.

He evidently knew the harness room, for he opened the blind door with hardly any hesitation and stepped into the office.