RATED 14+. Bear Grylls takes on Big Sky Country, paragliding above the Rockies, traversing vast gullies, and making the most of abandoned debris before making his great escape on a moving train.

The drilling rig Leiv Eirikkson faces the challenge of navigating one of the world's busiest shipping lanes and squeezing under two suspension bridges; 330 Squadron medivac a man with serious heart problems and his heart stops during the rescue.

RATED 14+. While on a hiking trip in Zimbabwe's Chizarira National Park, elephants attack two friends, leaving one bleeding out while the other struggles to find safety; a 12-year-old encounters an alligator while swimming in a Louisiana pond.

The folks at Bristol Motor Speedway hire the Outcast crew to customize an RV into the ultimate race fan experience; tensions are once again high as Kelvin commits to an ambitious deadline, infuriating the guys in the shop.

With 7.5 tons of steel salvaged from the Twin Towers forming her bow, USS New York is tribute to those who perished on 9/11; she was also built to launch up to 800 Marines and their fierce battle hardware ashore with speed and versatility.