- What are you going to do about it?
- When I am sure, I will destroy her.

5 seconds sound clip from the Isle of the Dead (1945) movie soundboard.

You can hear this line at 00:46:33.324 in the Blu-ray version of the movie.

Quote context

[...]

- Go to the young man, and wear the same happy look you had before.

- What do you mean, spying on us like this? You must have known we were here.

- That is why I came.

- Bosh. Come on, Thea.

- You might as well stay here, Davis. The island is small, and wherever you go, I'll go too. It's for your own safety.

- Wait a minute. You really mean that, don't you? You're really concerned. And you're going to tag along just to protect me.

- I am concerned.

- Let me get this straight. You feel that Thea is some sort of evil influence, and can harm me and the other people here, too. Is that it?

- What are you going to do about it?

- When I am sure, I will destroy her.

- General, you're right. There is something here more dangerous than septicemic plague.

- More dangerous as far as Thea is concerned. And that's your own crazy thoughts about her.

- You can say whatever you like.

- The only safe thing for Thea is to get her off the island. We'll leave in the morning. I'll row you over.

[...]