Behind the Scenes: Tour de Murdoch

Duration: 04:36

Cycling was the pre-eminent competitive sport in the early 1900s, but, like today, was not without a dark side. Learn about the real-life "godfather of doping" who inspired Sean Cullen's character; the complicated creation of Murdoch's bike gear system; and how the timely introduction of different blood types cracked the case wide open.