S1, E3: The final act begins – the Ripper must kill one more victim to complete his re-enactment of the 1888 murders. Chandler is near to breakdown as he struggles to find an answer. Forensics and CCTV are useless, and the team is forced to rely on its instincts, hoping that the past will provide some clue to the killer’s identity. But time is ticking away, and history tells us that Jack the Ripper was never caught.