He heard a sound on the other side of the door.

Only my father'd been on the other side of the open door all along, and he'd seen what really happened.

The voice came again from the other side of the door.

He could hear someone on the other side of the door.

No sound came from the other side of the door.

The children were just on the other side of the door.

You never knew what was on the other side of the door.

They started around, on the high side of the door.

The voice had come from the other side of the door.

Or was someone on the other side of the door?