For this feature-length behind-the-scenes look, "Sesame Street" granted unprecedented access to script, research, and production meetings--we even tape actors rehearsing without Muppets on their hands, which "Sesame Street" has never before allowed. We meet the stars--Bob (McGrath), Susan (Loretta Long), Maria (Sonia Manzano)--and Muppeteers--Carol Spinney (Big Bird, Oscar), Kevin Clash (Elmo), and Steve Whitmire, who does Jim Henson's characters--and learn that the original 1955 Kermit wasn't a frog!