In 1963 Sydney Newman, progressive head of BBC TV's drama department, wants to fill a Saturday tea-time slot with a show with youth appeal and hits on the idea of an august figure, like a doctor, leading a group of companions on time travel adventures. He engages inexperienced young producer Verity Lambert to expand the idea. Fighting sexist and racial bigotry Verity and young Indian director Waris Hussein persuade crusty character actor William Hartnell to play the doctor figure and, despite technical hiccups and competition with coverage of the Kennedy assassination, the first episode of 'Doctor Who' is born. As the show becomes a success Hartnell displays an obsession with his character but, after three years, ill health catches up with him and he starts to forget lines. Newman tells him that Doctor Who will 'regenerate' and he will be replaced by younger actor Patrick Troughton. Though attached to the part and reluctant to give it up Hartnell wishes every success to Troughton, the first of several actors to play a part which will endure for fifty years.

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions. As the rescue party drives deeper into uncharted caverns, nightmarish visions of the recent past begin to haunt Sarah and she starts to realize the full horror and futility of the mission. Subjected to the suspicion and mistrust of the group and confronted once more by the inbred, feral and savagely ruthless Crawlers, Sarah must draw on all her inner reserves of strength and courage in a desperate final struggle for deliverance and redemption.

Fleeing for their lives, a small party abandon their Civil War confederates and escape through an overgrown field. Thinking only of what lay behind, they are ambushed by two dangerous men and made to search the field. Psychedelia, madness and chaotic forces slowly overtake the group as they question what treasure lies within the malignant field.