And I prevented you from telling me your real name because I didn't want any of you to use any name other than your pseudonym.

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

You can hear this line at 01:08:46.072 in the Blu-ray version of the movie.

Quote context

[...]

- At the start of the evening, Yvette was here by herself, waiting to offer you all a glass of champagne.

- I was in the hall. I know because I was there.

- Then I hurried across to the kitchen. And the cook was in here, alive, sharpening knives, preparing for dinner.

- And then the doorbell rang. And it was you.

- Yes.

- I asked you for your coat, and I recognized you as Colonel Mustard.

- And I prevented you from telling me your real name because I didn't want any of you to use any name other than your pseudonym.

- And I introduced myself to you as a butler, and I made across the hall to the library.

- And then Yvette met you and smiled and poured you a drink.

- And the doorbell rang. And it was Mrs. White looking pale and tragic. And I took her coat and hung it up.

- And I introduced Mrs. White to Colonel Mustard. Hello. Hello.

[...]