May I present Professor Plum and Miss Scarlet.

4 seconds sound clip from the Clue (1985) movie soundboard.

You can hear this line at 00:09:38.044 in the Blu-ray version of the movie.

Quote context

[...]

- That must be it.

- Why has the car stopped?

- It's frightened.

(loud thunder noise)

- What a godforsaken place.

- Professor Plum and Miss Scarlet. I didn't realize you were acquainted.

- We weren't.

- May I present Professor Plum and Miss Scarlet.

- Of course, since you've each been addressed by a pseudonym, you'll have realized that nobody here is being addressed by their real name.

(Loud gong) Ah. Dinner.

- I'm sorry. I'm a little accident-prone.

- You'll find your names beside your places. Please be seated.

[...]