An anomaly appears in the flat of unsympathetic millionaire Sir Richard Bentley,ultimately turning him into a flesh-eating monster,slowly evolving into a giant fungus. Sir James allows an enthusiastic Danny to replace Cutter at the ARC and,along with Connor,he destroys the former Sir Richard by exposure to extreme cold. Jenny sees an old photograph of herself from the days when she was Claudia and decides to move on.

Sarah establishes the purpose of the artefact - it can predict the whereabouts of anomalies. Johnson, anxious to claim it for herself, deposes Sir James, causing the team to flee with it to a ramshackle safe house in deep woodland, where large and carnivorous prehistoric birds emerge through an anomaly to pursue them. Good teamwork sees off the predators and Johnson but Abby gets a shock due to her imbecile brother.

An odd-looking, wounded dinosaur leaps through an anomaly in a scrapyard, pursued by a medieval knight, who thinks it is a dragon and causes havoc in the high street during a carnival, believing he is in Hell. Whilst Abby patches up the creature's wounds, Sarah steps back in time through the anomaly to discover that the knight is William de Mornay, seeking redemption for his sins by slaying a dragon and on her return persuades him to spare the dinosaur and return home. Connor meanwhile takes drastic action to retrieve Abby's pet Rex, lost in a card game by her brother.