How did Sesame Street Change TV Forever?

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Next year Children's Television Workshop turns 50, and Will and Mango are scouring the street for all the best dirt. From why the show started out on NBC, to how Ernie and Bert got downgraded from being the show's only stars, to the reason Jim Henson was so against children's programming, we'll explore the evolution of show and why it continues to be one of the most important experiments in American television.