Which documentary series included an episode discussing the album including songs composed by Gedy Lee and Alex Lifeson with lyrics by Neil Peart telling a story set in a dystopian future?
2112 (song):  On the "2112 / Moving Pictures" episode of the documentary series "Classic Albums", producer Terry Brown states the synth intro is composed of various parts played by Hugh Syme that were put together in a collage. 2112 (album):  Released on 1 April 1976, it features the seven-part title suite composed by Geddy Lee and Alex Lifeson, with lyrics written by Neil Peart telling a dystopian story set in the year 2112.
"Classic Albums"