Martha Jones, ex-time traveler, has been called to CERN, the world's largest particle physics laboratory, in Geneva. They're about to activate the Large Hadron Collider, designed to recreate conditions after the Big Bang and thus give an insight into what the Universe is made of. But so much could go wrong: it could open a gateway to a parallel dimension, or even create a black hole.

John Barrowman, Eve Myles and Gareth David-Lloyd star in three Torchwood radio adventures from the Lost Files, each set before the TV story Children of Earth. The Devil and Miss Carew sees Gwen and Rhys involved in a nursing home mystery. Submission finds the Torchwood team heading for the bottom of the sea – the Mariana Trench – after they intercept a distress call. The House of the Dead sees a special séance being held at the most haunted pub in Wales.

When PC Andy Davidson arrests a young girl for shoplifting, he thinks it's going to be a routine case. That is, until he sees that she is carrying a gun. The girl is soaking wet, covered in mud, and the weapon is like nothing he's ever seen before. He knows that this is a case for Torchwood...

When a Cardiff hospital is inundated with patients that have fallen into coma-like trances, Torchwood move in to investigate. They find that the trances were triggered by phone calls, all of which were made from a number that hadn't been active for over 30 years. Determined to find out who's been calling the unfortunate victims, Jack rings the mysterious number - two, zero, five, nine - nothing. It's a dead line. Until it calls Jack back, he answers - and falls into a deep trance...

A storm is brewing: the water levels of the Bristol Channel are inexplicably rising, and Cardiff Bay is under threat from the worst flooding in years. In the midst of the climate chaos, Torchwood is called to investigate a series of gruesome murders.