- Did none of you deduce that the others were involved, too? What others?
- The cook and Yvette.
- No.

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

You can hear this line at 01:12:18.198 in the Blu-ray version of the movie.

Quote context

[...]

- You found it. You could've known about it all the time.

- But I didn't.

- Well, why should we believe you?

- Because she was with us all in the billiard room doorway while Yvette was screaming, don't you remember?

- But what I don't understand is why was the cook murdered? She had nothing to do with Mr. Boddy.

- Of course she did.

- I gathered you all here together because you were all implicated in Mr. Boddy's dastardly blackmail.

- Did none of you deduce that the others were involved, too? What others?

- The cook and Yvette.

- No.

- That's how he got all his information.

- Before he could blackmail anyone, Mr. Boddy had to discover their guilty secret.

- The cook and Yvette were his accomplices.

- I see. So whoever knew that the cook was involved killed her?

- Yes.

[...]