The first episode traces the development of the four rocky planets in our solar system : Mercury, Venus, Earth and Mars. They were born at the same time from the same material, yet have gone entirely different paths. What forces are at work behind it? Why has Earth thrived whilst the others have faded away? Advanced space missions reveal the moments when the fate of these worlds turned.
After a local photographer wins an urban myth competition with his creation of The Wolf Hunter, it unexpectedly gains a cult following. However, when a man is killed, Barnaby must investigate if this myth has become murderous reality.
After 20 years of living in Washington, D.C., Mark Klein seeks much-needed solace by moving to the remote wilds of West Virginia. To ease his loneliness, he sends regular video updates to members of his OCD-support group back in the city. But Mark gradually realizes that despite his new, isolated setting, he may not be alone. From the endless woods surrounding his home, something else is watching.