Dan Jones, Suzannah Lipscomb and Rob Bell take a fresh look at the Great Fire of London in 1666 by walking the actual route the fire took across the city, hour-by-hour and street-by-street, hoping to uncover what really happened during Britain's worst inferno. In this first edition, the three presenters investigate how the fire started, heading to Pudding Lane, site of the bakery where the blaze broke out. Dan and historian Dorian Gerhold then place a temporary 'blue plaque' on the very spot where the fire began