This new documentary special – part biography, part concert and performance retrospective – covers the 50-year career of Cat Stevens, the musician whose contributions to the film Harold & Maude, and his hugely popular introspective singer-songwriter LPs of the early Seventies, briefly put him at the top of the pop music business. Then he quit, to focus on his family and his faith, converted to Islam, and changed his name to Yusef. He returned to music, and recording, in the 2000s