Bill D,Sounds like you have in mind something like The Stage Manager from Our Town as your role of choice. (For what it's worth, Thornton Wilder's masterpiece is arguably another good framework to keep in mind as this macro-series evolves... It's inclusive, relies heavily on the imagination to make it work, does its best to eliminate the artificial barriers between stage players and audience; it's warm and funny, wise without cynicism and it's as familiar and comfortable as an old shoe.)
By the way, I'm assuming this series is being done on a PBS-ish or otherwise non-commercial basis, right? I'm hoping we're not going to have to keep cutting in and out for words from our sponsors...