Executive producer and writer of HBO's Oz Tom Fontana and psychology professor Paul Ekman on this edition of Fresh Air. Tom Fontana is responsible for Oz, the realistic drama about life in an experimental unit of a maximum security prison. Fontana also created Homicide: Life on the Street and the 1980s drama set in a city hospital, St. Elsewhere. Paul Ekman's new book is Emotions Revealed: Recognizing Faces And Feelings To Improve Communication And Emotional Life. Ekman describes how facial expressions work. For example, he can tell the difference between a fake and a real smile by mapping the muscle movements of both. Ekman is professor of psychology in the department of psychiatry at the University of California Medical School, San Francisco. He frequently consults for government agencies like the FBI. (Broadcast Date: May 22, 2003)