Jeff's adventure continues as he uses different forms of transportation, including float planes and boats, to see the sights of Alaska.

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.