Detect when an MC has finished

Hi there

I have a movie that plays a series of movie clips, it will play a clip, then, once the clip has finished, it will move to frame 2, where it will play another clip, and so on

Is there any way for the root timeline to now when a child movie clip has completed. I currently have the child clips do _root.nextframe, but i would prefer to have all control within the root

many thanks