21 Bear enters the Guatemalan jungle to relive the experiences of three groups of jungle survivors. Mexican archaeologist Armando Anaya tells how his team were attacked by bandits as they excavated Mayan ruins, then stripped of their belongings and forced across a dangerous river. In Malaysia, British microbiologist John Gillat had only set out on a short walk from his hotel when he got lost in the jungle. It was soon clear he would have to stay in the jungle for the night. Two Frenchmen, Loic Pillois and Guilhem Nayral, went on an expedition into the Amazon rainforest which turned into a gruelling 52 day ordeal. Bear experiences their toughest challenges and demonstrates the survival skills they used to stay alive – from river crossings, to tarantula hunting and lighting signal fires.