Ashton Kutcher says he's 'lucky to be alive' after rare disorder left him unable to see, hear, or walk Watch Keegan-Michael Key show off his Obama impression for Bear Grylls in Running Wild clip ...

See what happens when they interact with wolves, bear and other wildlife on their journey to become the conservation leaders of the future.

Wild" series, and hosted a slew of other adventure shows, including "The Island With Bear Grylls," "Bear Grylls' Survival School," and "Running Wild." "Hostile Planet," his current project ...