Alien

Ripley: Ash, that transmission, MOTHER's deciphered part of it. It doesn't look like an S.O.S. Ash: What is it, then? Ripley: Well, it looks like a warning. I'm gonna go out after them. Ash: What's the point? I mean, by the, the time it takes to get there, you'll, they'll know if it's a warning or not, yes?

Alien (film), CC BY-SA 4.0

Dallas: Okay, Ripley, we're clean. Let us in. Ripley: What happened to Kane? Dallas: Something's 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 procedures: 24 hours for decontamination. Dallas: He could die in 24 hours! Open the hatch. Ripley: Listen to me. If we break quarantine, we could all die. Lambert: Look! Would you open the goddamn hatch? We have to get him inside! Ripley: [briefly pauses] No. And if you were in my position, you'd do the same. Dallas: Ripley, this is an order. You open that hatch right now, you hear me? Ripley: Yes. Dallas: Ripley, that was an order! Do you hear me?! Ripley: Yes, I read you. The answer is negative. Ash: [opens the inner hatch door and lets Dallas and Lambert in with Kane] Inner hatch opened.

Alien (film), CC BY-SA 4.0

Dallas: All right! Ripley, when I give an order, I expect to be obeyed! Ripley: Even if it's against the law?! Dallas: YOU'RE GODDAMN RIGHT!! Parker: Well, now that she has a point, you know, who the hell knows what that thing is!

Alien (film), CC BY-SA 4.0

Dallas: [looks at a pen being dissolved by alien's body fluid] I haven't seen anything like that except molecular acid. Brett: It must be using it for blood. Parker: It's got a wonderful defense mechanism. You don't dare kill it.

Alien (film), CC BY-SA 4.0

Ripley: [watching Ash examine the creature] That's amazing. What is it? Ash: Uh, yes, it is. Uh, I don't know yet. Did you want something? Ripley: Yes, I, uh … have a little talk. How's Kane? Ash: He's holding, no changes. Ripley: And, uh... our guest? Ash: Oh. Ripley: Hm? Ash: Well, as I said, I'm still... collating, actually. But I have confirmed that he's got an outer layer of protein polysaccharides. Has a funny habit of shedding his cells and replacing them with polarized silicon, which gives him a prolonged resistance to adverse environmental conditions. Is that enough?

Alien (film), CC BY-SA 4.0