Although humans can make more than 3,000 hand gestures, even the simpest have numerous variations and interpretations. This program, filmed on five continents, examines not only hand gestures, but facial expressions, head shakes and body distance as well--and the misunderstandings that can occur when body language is transported across cultural lines. Supression of body language is also discussed, along with "nonverbal leakage," in which the body's language can belie a speaker's words.