Lighting designer Ken Billington, veteran of more than 80 Broadway productions ranging from the original "Sweeney Todd" to the current "Sunday in the Park with George", discusses the art of lighting design, including how lighting can be used to emotionally enhance the theatre experience, how he discovered his calling during a fourth grade play, what audience members might look for when assessing a lighting designer's work, the speed with which his design for "Sweeney" came together, how he collaborated with the English creative team of "Sunday", how rock and roll helped Broadway lighting, and how his career has encompassed work for performers as diverse as Liza Minnelli and Shamu the Killer Whale. Original air date - April 4, 2008.