Ripley: That's amazing. What is it? Ash: Uh, yes, it is. Umm. I don't know yet. Did you want something? Ripley: Yes, I, uh... have a little talk. How's, uh, how's Kane? Ash: He's holding, no changes. Ripley: And, uh, our guest? Ash: Umm. Ripley: Hmm? Ash: Well, as I said, I'm still... collating, actually, but uh, 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? Ripley: That's plenty. What does it mean? [Ripley bends down to look through the micro-scanner] Ash: Please don't do that. Thank you. Ripley: I'm sorry. Ash: Well, it's an interesting combination of elements making him a... tough little son-of-a-bitch. Ripley: And you let him in. Ash: I was obeying a direct order. Remember? Ripley: Ash. When Dallas and Kane are off the ship, I'm Senior Officer. Ash: Oh, yes, I forgot. Ripley: You also forgot the Science Division's basic quarantine law. Ash: No, that I didn't forget. Ripley: Oh, I see, you just broke it. Hmm? Ash: Look, what would you have done with Kane, hmm? You know his only chance of survival was to get him in here. Ripley: Unfortunately, by, uh, breaking quarantine, you risk everybody's life. Ash: Maybe I should have left him outside. Maybe I've jeopardized the rest of us, but it was a risk I was willing to take. Ripley: That's a pretty big risk for a Science Officer. It's, uh, not exactly out of the manual, is it? Ash: I do take my responsibilities as seriously as you, you know. You do your job and let me do mine, yes?
Ripley talks to Ash about the alien that he let onto the ship even though it broke the quarantine guidelines.