God is change. That is the central truth of the Earthseed movement, whose unlikely prophet is 18-year-old Lauren Olamina. The young woman's diary entries tell the story of her life amid a violent 21st-century hell of walled neighborhoods and drug-crazed pyromaniacs - and reveal her evolving Earthseed philosophy. Against a backdrop of horror emerges a message of hope: if we are willing to embrace divine change, we will survive to fulfill our destiny among the stars.

Facing down an unprecedented malevolent enemy, the government responds with a nuclear attack. America as it was is gone forever, and now every citizen - from the President of the United States to the homeless on the streets of New York City - will fight for survival. In a wasteland born of rage and fear, populated by monstrous creatures and marauding armies, earth's last survivors have been drawn into the final battle between good and evil, that will decide the fate of humanity.

This trip is going to be Dylan’s big break. Her geologist friend Clay has discovered an untouched cliff face in the Kentucky wilderness, and she is going to be the first person to climb it. Together with Clay, his research assistant Sylvia, and Dylan’s boyfriend Luke, Dylan is going to document her achievement on Instagram and finally cement her place as the next rising star in rock climbing. Seven months later, three bodies are discovered in the trees just off the highway. All are in various states of decay.

Episode Thirteen takes them to every ghost hunter's holy grail: the Paranormal Research Foundation. This brooding, derelict mansion holds secrets and clues about bizarre experiments that took place there in the 1970s. It's also famously haunted, and the team hopes their scientific techniques and high tech gear will prove it. But as the house begins to reveal itself to them, proof of an afterlife might not be everything Matt dreamed of.

A dinner party is held in the penthouse of a multimillion-pound development. All the guests are strangers - even to their host, the billionaire owner of the building. None of them know why they were selected to receive his invitation. Besides a postcode, they share only one thing in common - they've all experienced an unsettling occurrence within the building's walls. By the end of the night, their host is dead, and none of the guests will say what happened. His death remains one of the biggest unsolved mysteries - until now.