The documentary reveals the hidden power of sound in film and in our lives through interviews, film clips and a look at its actual process of creation and discovery. It captures the history, impact and creative process of this art form with insightful, poignant and entertaining stories told by legendary sound designers and visionary directors, and the sound artists they collaborate with who create the magic in all the films we love.

A brawl involving players and fans broke out near the end of a game between the Indiana Pacers and the Detroit Pistons on November 19, 2004. Nearly 17 years later, we re-examine that night and all the consequences that came from it.

On August 7th, 1974, a young Frenchman named Philippe Petit stepped out on a wire illegally rigged between the New York World Trade Center’s twin towers. After dancing for nearly an hour on the wire, he was arrested, taken for psychological evaluation, and brought to jail before he was finally released. This extraordinary documentary incorporates Petit’s personal footage to show how he overcame seemingly insurmountable challenges to achieve the 'Artistic crime of the century'.

It tells the story of FIFA World Cup of 1950, highlighting (but also showing other nations) the path of the two teams who played the final match: Uruguay and Brazil. The high quality of the footage is amazing, the text is smart and humorous, the music has been very well chosen in order to represent both the emotions involved in each moment and the contrast between the calmness of Uruguayan preparation and the crowded days of Brazilian team." The whole story shows not only one side. While Uruguayan team acquired confidence after an initial mistrust, Brazil was by far the best team in the competition but was heavily influenced by the environment in Brazilian society, the influence of politics and the pressure of the fans. While Uruguay overcame heroically all the constraints and, led by Obdulio Varela, won a title that few people believed, Brazilians got shocked because they considered themselves champions even before the final match, and their players became stigmatized until nowadays, not being celebrated as the fantastic team they were.

At the end of each Antarctic summer, the emperor penguins of the South Pole journey to their traditional breeding grounds in a fascinating mating ritual that is captured in this documentary by intrepid filmmaker Luc Jacquet. The journey across frozen tundra proves to be the simplest part of the ritual, as after the egg is hatched, the female must delicately transfer it to the male and make her way back to the distant sea to nourish herself and bring back food to her newborn chick.

In this final episode we complete our journey, travelling back from the March equinox to the end of June. Kate Humble is in the Arctic at a place where spring arrives with a bang, whilst Helen Czerski chases a tornado to show how the earth's angle of tilt creates the most extreme weather on earth.