4th and Forever: Muck City

This follows a trail of energy into the power centers of the universe.

In the shadows of the Smoky Mountains lives a football dynasty. Alcoa High School is southern Appalachia's true football powerhouse.

How, from bizarre ancient markings to random numbers and letters, codes and ciphers have been used for millennia to send secret messages, hide identities.

With personal interviews, Legends of Speed not only describes dramatic happenings on the race tracks, but also puts a spotlight on the fears, and the courage of the drivers and their relatives. All of them deal differently with the extreme sport of "Formula One" racing, but they all have one thing in common and that is the will to win.

How will humans take the next step into outer space - traveling to Mars not to visit, but to stay?

Humans may one day need to leave planet Earth to survive. One possibility is Mars. Examine advances and developments that have brought us this far, and how much more needs to be done to make Mars a habitable reality.