When a local teenager disappears, Gwen is drawn into an investigation that reveals a darker side of Torchwood. Hundreds of people have disappeared without trace, but why is Captain Jack obstructing attempts to find them? The answer seems to lie in the rift. Literally. And as Gwen follows the trail, she makes a shocking discovery. The guest stars in this episode are Ruth Jones (Nighty Night, Little Britain, Gavin & Stacey) as Nikki Bevan, and Robert Pugh (Master and Commander: The Far Side of the World, Prime Suspect 6: The Last Witness) as the Old Man.