- Dr. Egon Spengler: This is going to be very difficult, Janine, I... I'll need your help.
- Janine Melnitz: [hearts in her eyes] All right, Egon, just as long as you know I'm doing it for you, and not this C... C... C...
- Dr. Egon Spengler: Christmas.
- Janine Melnitz: [stomps her foot] Bah humbug!
- Dr. Egon Spengler: [takes her by the arm and heads for the basement] Christmas.
- Janine Melnitz: Humbug!
- Dr. Egon Spengler: Fascinating.
- Peter Venkman: [Has Scrooge looking through a viewmaster] And don't touch the magic window or we'll fall.
- Winston Zeddemore: [picks up a book] A Christmas Humbug by... Ebenezer Scrooge?
- Dr. Raymond Stantz: But, but that's the guy we helped. That's impossible! How could we help Scrooge? Unless... we went back in time! Oh boy!
- Winston Zeddemore: Egon! No, Wait!
- Dr. Raymond Stantz: Those three ghosts, Egon! Are they?
- Dr. Egon Spengler: Of course. I just finished now.
- Peter Venkman: Egon, you sure you can't let those three loose without letting them all out?
- Dr. Egon Spengler: Correct, but... why would we want to?
- Dr. Raymond Stantz: Oh, no. I can't believe it. We really done it this time.
- Dr. Egon Spengler: Why, what, what did we do?
- Dr. Raymond Stantz: We just killed Christmas, Egon. Christmas is gone. Forever.
- Ebenezer Scrooge: There's more of gravy then of grave to those ghosts.
- Peter Venkman: We're talking money and he's talking lunch. I'd say we were at an impasse, wouldn't you?
- Ebenezer Scrooge: [the Ghostbusters busted the three ghosts of Christmas] You have my eternal, unwavering gratitude. What you've done here tonight...
- Peter Venkman: Will cost you some pretty big bucks if you'd like to write out a check.
- Peter Venkman: [Venkman is pretending to be the Ghost of Christmas Past, having taken Scrooge on a makeshift tour of his past] Now, what have you learned?
- Ebenezer Scrooge: Oh, I'm dreadfully sorry. Was I supposed to be learning something?