We didn't hear the cook scream because Mrs. Peacock was screaming about the poisoned brandy.

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

You can hear this line at 01:19:29.946 in the Blu-ray version of the movie.

Quote context

[...]

- Then there were three more murders.

- So which of us killed them?

- None of us killed Mr. Boddy or the cook.

- So who did?

- The one person who wasn't with us. Yvette.

- Yvette?

- She was in the billiards room listening to our conversation.

- She heard the gunshot. She thought he was dead.

- And while we all examined the bullet hole, she crept into the study, picked up the dagger, ran to the kitchen, and stabbed the cook.

- We didn't hear the cook scream because Mrs. Peacock was screaming about the poisoned brandy.

- Then Yvette returned to the billiard room. She screamed, and we all ran to her.

- When did she kill Mr. Boddy?

- When I said.

- We all ran to the kitchen to see the cook.

- Yvette hid in the study to check that Mr. Boddy was dead.

[...]