How do I stop a scene

I lay there movieclip in one of 10 scenes, and when I test the movie as it loops. I have tested with mc.stop (); but it doesn't. I want to get a stop and how I do it.

If you mean the movieclip keeps looping then you need to include a command for the movieclip to stop.  mc.stop(); might work if you named it "mc" and it is a timeline-based animation