Professor Jim Al Khalili delves into over 50 years of the BBC science archive to tell the story behind the emergence of one of the greatest theories of modern science, the Big Bang.

The idea that our universe simply began from nothing has not always been widely accepted with the conviction it is now and, from fiercely disputed beginnings, took many years to emerge as the de-facto explanation of how our universe began. Using curious horn-shaped antennas, U-2 spy planes, satellites and particle accelerators, scientists have slowly pieced together the cosmological puzzle, and this documentary charts the overwhelming evidence for a universe created by a Big Bang.