Bear Grylls presents the series in which eight celebrities face a 12-day survival mission through the rainforest of Costa Rica. To stay alive, they must learn to navigate the terrain, build shelters, make fire and supplement their meagre army rations. Emilia and Laurence Fox, Max George, Dame Kelly Holmes, Jamelia, Tom Rosenthal, Vogue Williams and Mike Tindall make up the team. On the ground, Bear is assisted by expedition leaders mountain guide Meg Hine and former commando Scott Heffield. In this edition, the celebrities have to negotiate their way down a steep ravine in dense jungle to reach their camp for the night. Bear shows them how to avoid insect bites with nature's own repellent - mud. The following morning, he has them abseiling down a 120-foot waterfall. Once they have all been retrieved safely by Scott, Bear has another treat in store - they are going to have to drink their own urine. Who has done most to impress and who is about to be sent home?