Few figures have played such a seminal role in our moving picture history as the revolutionary photographer Eadweard Muybridge. His unprecedented images of running horses instantly transformed the camera into a machine of unmatched powers of perception and persuasion, and set the course for the birth of cinema. Muybridge was a complicated man whose personal story was imbued with ambition, success, loss, and even cold-blooded murder. He directly inspired numerous artists from Francis Bacon to David Hockney to Gary Oldman, whose passionate contribution to this documentary is exceptional.