Season 2015 - Episode Guide

Exploring Mosquita, the largest untouched rainforest in Central America where legends swirl of a white city buried inland.

Bill Nye experiences the five stages of climate change grief – from denial to acceptance – and along the way, he'll explore what's gone wrong with our planet and how we can start to turn things around.

Explorer examines the global phenomenon of the "cult" of Mary. The episode opens a window into the many ways devotees venerate the Virgin Mary. From a small community in Alabama to thousands of people gathering in Mexico, Mary draws millions of people to shrines and sustains religious tourism that's estimated to be worth billions of dollars a year. The film is a journey into the heart of modern-day Mary devotion around the world.