Go behind the curtain to reveal the techniques of America's favorite comedic actors. The manic improvisational styles of Robin Williams and his comic predecessor Jonathan Winters provides a fascinating contrast to Tina Fey's measured, highly prepared approach. The episode also highlights the all-time #1 Emmy winner for comedy acting: Cloris Leachman. Featured interviews include: Robin Williams, Tina Fey, Jonathan Winters, Dick Van Dyke, Jimmie Walker, Cloris Leachman.