A famous psychologist, Margaret Ford, decides to try to help one of her patients get out of a gambling debt. She visits the bar where Mike, to whom the debt is owed, runs poker games. He convinces her to help him in a game: her assignment is to look for "tells", or give-away body language. What seems easy to her becomes much more complex. Written by John J. Magee <magee@helix.mgh.harvard.edu>