Dallas: Something has attached itself to him. We have to get him to the infirmary right away. Ripley: What kind of thing? I need a clear definition. Dallas: An organism. Open the hatch. Ripley: Wait a minute. If we let it in, the ship could be infected. You know the quarantine procedure. Twenty-four hours for decontamination. Dallas: He could die in twenty-four hours. Open the hatch. Ripley: Listen to me, if we break quarantine, we could all die. Lambert: Look, could you open the god-damned hatch? We have to get him inside. Ripley: No. I can't do that and if you were in my position, you'd do the same. Dallas: Ripley, this is an order. Open that hatch right now, do you hear me? Ripley: Yes. Dallas: Ripley. This is an order. Do you hear me? Ripley: Yes. I read you. The answer is negative.