The door is barely shut when there's a momentary humming sound from it, and a click.

The Kaleesh's face, still rather blurry, appears on the computer.

"You have been sealed in. The door can't be opened now, there's little to suggest it's anything more than a mirror. You'll find food and water under the beds. Get some sleep, and watch the news - The door will be unsealed in twelve hours, when the initial search effort has passed."