James Doohan: Scotty
[their first look at the USS Excelsior]
Uhura : Would you look at that.
Kirk : My friends, the great experiment: The Excelsior. Ready for trial runs.
Sulu : She's supposed to have transwarp drive.
Scotty : Aye. And if my grandmother had wheels, she'd be a wagon.
Kirk : Come, come, Mr. Scott. Young minds, fresh ideas. Be tolerant.
Kirk : How much refit time before we can take her out again?
Scotty : Eight weeks, sir. But ye don't have eight weeks, so I'll do it for ye in two.
Kirk : Mr. Scott. Have you always multiplied your repair estimates by a factor of four?
Scotty : Certainly, sir. How else can I keep my reputation as a miracle worker?
Kirk : [over the intercom] Your reputation is secure, Scotty.
Kirk : Scotty, you're as good as your word.
Scotty : Aye, sir. The more they overthink the plumbing, the easier it is to stop up the drain.
[giving McCoy a handful of computer chips]
Scotty : Here, Doctor, souvenirs from one surgeon to another. I took them out of her main transwarp computer drive.
McCoy : Nice of you to tell me in advance.
Kirk : That's what you get for missing staff meetings, Doctor. Gentlemen, your work today has been outstanding and I intend to recommend you all for promotion... in whatever fleet we end up serving.
Captain Styles : Ah, Mr. Scott. Calling it a night?
Scotty : Uh, yes sir.
Captain Styles : Turning in myself, looking forward to breaking some of the Enterprise's speed records tomorrow.
Scotty : Ah, yes sir.
[behind his back, frowning]
Scotty : Good night.
Elevator voice : Level, please.
Scotty : Transporter room.
Elevator voice : Thank you.
Scotty : [under breath] Up your shaft.