Season 1, Episode 2:
Mammoth spiders attack London's Underground, but in the darkness of the tunnels lies something more sinister still. Cutter starts to suspect that his missing wife Helen knew about the anomaly. While everyone presumes the discovery of her camera, millions of years in the past, confirms her death, Cutter is developing an entirely different theory.
Were the giant creepy-crawlies depicted in tonight's episode real? YES! Click here to read more about the real-life prehistoric monsters that inspired the "Primeval" creatures of the week!