Running Wild with Bear Grylls Season 4

Season four promises to be the most exciting yet, with some of the biggest stars of sports and entertainment joining Bear. Celebrities set for a life-altering adventure over the season's eight episodes are legendary tennis champion Roger Federer, Golden Globe Award nominee Joseph Gordon-Levitt, "Game of Thrones" star Lena Headey, two-time Emmy Award winner and "Orange Is the New Black" star Uzo Aduba, Golden Globe winner and "The Americans" star Keri Russell, Oscar nominee Don Cheadle, "The Fate of the Furious" co-star Scott Eastwood and "World of Dance" judge Derek Hough.