It's been 48 hours since the men had a meal and hunger grips the group. The race is on to bring food back to camp before they become too weak to hunt. The men take greater and greater risks in the pursuit of vital calories, desperate to seek new ways to chase, trap and outsmart the island's elusive wildlife. Ryan lashes out in anger and Craig is left deflated. And then they come face to face with one of the island's most fearsome predators - the caiman crocodile.

• Bear Grylls