The Shadow moved out into darkness and used his special key to lock the door behind him.

She didn't want to get back together with Steve, but instead asked for his help in finding a special key.

With the aid of a special key, he again locked the door.

However, the return module is designed to allow access from the outside only to those with a special key.

You'd need a special key to turn off the respirator.

It seemed to him there was a missing element, a special key.

Additional letters can be accessed by using a special key.

Even the lifts would not go there without a special key.

To the left, a door led to a back staircase, accessible with the special key already in his hand.

With one of his special keys he opened the door and went into the building.