Project Impossible

Throughout history, mankind has built amazing structures, engineered to overcome unique challenges. Now, a new class of super structures are taking on the impossible: the largest moveable building in history, a super-tall skyscraper built to withstand killer earthquakes, a next-generation sports stadium inspired by an ancient Roman temple, and a bridge being raised while it stays open to traffic.

Around the world, a new class of superstorms is overwhelming our coasts. If nothing is done, great cities like New York, Venice, and Tokyo will simply disappear. Engineers are fighting back, raising some of the biggest sea defenses in the world. On this episode: Venice flood barrier; Tsunami Machine; Tokyo underground water diversion tunnels; New Jersey storm defense.

In the past 50 years, the world's energy use has doubled. In the next 50 years, it will double again. Can we keep up with demand - or will we plunge into darkness? Across the world, engineers are going to extreme lengths to keep the lights on: harnessing the power of the longest river on Earth, tapping into the raging heat of a live volcano, and building one of the largest offshore wind facilities in the world. This is Project Impossible: Battling the Blackout.

Toppling giants of concrete and steel is dangerous and deadly. In demolition, one mistake can cost you your life. On this episode: imploding a casino; dismantling chemical weapons; tripping a silo.

Above the arctic circle, projects are underway that are opening up the arctic to the rest of the world. What does it takes to build in the world's coldest conditions? On this episode: building a nuclear-powered icebreaker in Russia; laying the world's first trans-arctic cable in Alaska; constructing a modern airport on Baffin Island; building a permanent highway in middle of arctic winter.

New technology is allowing us to build underground structures that far surpass any building on earth. South Dakota is building a mile deep structure, inside an abandoned gold mine, to study the universe. London is building a "silent" rail network to prevent gridlock. Mexico City is burrowing 39 miles underneath the city to save it from drowning. On this episode: Sanford Underground Research Lab; London Cross Rail and Mail Rail; Mexico City Emisor Oriente.