Broke and desperate, paleontologist Grant Coleman gets the chance of a lifetime exploring a long-sealed cave, the fabled home of a gigantic creatures. NPS Ranger McKinley Stinson discovers a rancher’s prize bull has been butchered by an airborne killer, and tracks the blood trail back to the re-opened cavern. But as she’s about to arrest the trespassers, the unstable roof collapses, trapping all.

A man of great power and wealth, Robert Jensen wasn't content with the ordinary. His drive to conquer the world led him to its darkest corners. There, he began to assemble a collection of monsters beyond belief - Sasquatch, Thunderbirds, Skunk Apes, and more.

A deep sea fracking operation in the Arctic Ocean breaks through into a world hidden for 15-million years, an undersea cavern from the Pliocene Epoch of the Cenozoic Era. Among the prehistoric terrors unleashed is a giant megalodon, a shark so efficient it had no need to change for 20-million years. Asa Iverson was the only survivor from the Global Kulik incident. Now, the nightmares haunt him. Did he see a colossal shark long thought extinct, or was it a hypothermia-induced hallucination?

On a desolate beach in far northern Scotland, the winter storms have been washing up all manner of things since time began. But buried in the centre of one smaller iceberg is a shard of ancient Viking pottery telling a partial tale of a hidden mysterious island beyond the ice and mist, that was home to a great treasure and even greater horrors. Thawing in the same block of ice was a rotting flap of skin that refused to be identified but had similar skin patterns to a creature not seen for 100 million years.

Down there, beyond the deepest caves, below the crust and the mantle, there is another world. An old woman locked away in a Russian asylum has a secret - knowledge of a 500-year-old manuscript written by a long-dead alchemist that will show a passage to the mythical centre of the Earth. She knows it’s real because 50 years ago, she and a team travelled there. And only she made it back. Today, caving specialist Mike Monroe leads a crew into the world’s deepest cave in the former Soviet Union.

Compiled by intrepid journalist Neve Pride, this archive of recordings spans the months after dragons emerged on earth, chronicling the communities that sprang up amid the destruction, the scientists, military leaders, and experts searching for a defense, and those steadfastly seeking the missing. Neve and her young daughter Bex travel among the wreckage speaking to those left behind and surviving, against all odds. Neve records everything for history, and in the hopes of locating a clue as to where the dragons came from and how one might stop them.

Ryland Grace is the sole survivor on a desperate, last-chance mission - and if he fails, humanity and the Earth itself will perish. Except that right now, he doesn't know that. He can't even remember his own name, let alone the nature of his assignment or how to complete it. All he knows is that he's been asleep for a very, very long time. And he's just been awakened to find himself millions of miles from home, with nothing but two corpses for company.

Annie has always had high hopes for her future. But the reality of her life just isn’t measuring up. She loves her fiancé, Greg–doesn’t she? She’s going to get her degree and open her own business–won’t she? Then, a strange old woman shows up outside her house, and she seems to know a lot about Annie. An awful lot. Annie could tell the old woman to get lost. Yet there’s something about her Annie just can’t shake. And what she learns could change her life forever–but is it the life she envisioned?

For some it’s an opportunity. For others it’s a moment to question their faith: In God, in science, in everything. Still others try to keep the world running in the face of absurdity and uncertainty. And then there are the billions looking to the sky and wondering how a thing that was always just there is now... something absolutely impossible.

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him and forces his crew to evacuate while thinking him dead, Mark finds himself stranded and completely alone with no way to even signal Earth that he’s alive - and even if he could get word out, his supplies would be gone long before a rescue could arrive. But Mark isn't ready to give up yet.