Episode 3. A space mission discovers the dramatic history of the Milky Way and reveals how our galaxy endured multiple collisions as rival galaxies fought for survival. 3/5. This series combines stunning CGI imagery, the latest scientific research and archival footage captured during scientific missions to immerse viewers in the expansive and dramatic story of the universe, from its moment of inception 13.8 billion years ago, to what could be its ultimate fate, trillions upon trillions of years in the future.