I was watching a movie on HBO last night, and the actress looked bored while delivering her lines. Sort of like she had said them a half dozen times before and was going through the motions and wanted to move on.

That got me to thinking – she may very well have, and I (the viewer) would be none the wiser.

I would find it useful to know whether a given scene in a movie was the first take (likely to be fresher) or the 10th or 20th.

Is there any way to know?