Bear Grylls goes urban!  Discovery Channel’s all-new original series WORST CASE SCENARIO, based on the bestselling series of books with the same name, premieres Wednesdays at 10PM ET/PT.  On the show, Grylls portrays potentially life-threatening situations to demonstrate how to survive in a worst case scenario.  Filmed like a feature film, Grylls pushes his physical boundaries – part stuntman, part urban survivalist – to exhibit scenarios that viewers could find themselves in at any time.