Tracks: Chimera

A tower block collapses in London. Hundreds are killed.

Except a man standing alone on the roof, who walks out of the rubble unscathed.

And things are about to get stranger, because Dr Helen Ash is pregnant. But she hasn't had sex since her husband died 18 months ago.

What connects her unexplained pregnancy, a mysterious phone message from a woman who died in the building collapse, and the man on the roof of the high-rise?

The gripping conspiracy thriller and winner of Best Sound (BBC Audio Drama Awards) and Best Fiction (British Podcast Awards) returns for a third series.

Tracks: Indigo

Dr Helen Ash is involved in a road accident. But where was she going in such a hurry? And why can't she remember?

The answer lies in the riddle of Helen's daughter, Frances, who's older than she should be. And a mysterious 'child-mother', who's younger than she should be...

Romola Garai returns as Helen Ash in the compelling fourth series of Tracks.

Cast of Tracks: Chimera
Helen.... Hattie Morahan
Freddy..... Jonathan Forbes
Rachel.... Fiona O'Shaughnessy
Other parts played by Rhodri Meilir, Eiry Thomas, Zahra Ahmadi, Clare Cage, Marc Danbury, Stewart Wright, Richard Elfyn, Kerry Shale, Elina Alminas, Carys Eleri, Morgan Watkins, Jeanette Percival, Matthew Gravelle, Richard Nichols, Amerah Saleh, Adam Deacon, Bijan Daneshmand, Emma Handy, Lea Mornar, Francois Pandolfo, Simon Armstrong, Saffron Coomber and Sean Murray

Lead writer.... Matthew Broughton
Episodes written by Matthew Broughton, Matt Hartley, Lucy Catherine, Caroline Horton and Timothy X Atack
Directed by James Robinson, Rebecca Lloyd-Evans and Carl Prekopp
Produced by James Robinson
A BBC Cymru Wales Production

Cast of Tracks: Indigo
Helen.... Romola Garai
Freddy.... Jonathan Forbes
Other parts played by Andrew Gower, Georgia Henshaw, Sally Orrock, Carys Eleri, Sion Pritchard, Joanna van Kampen, Scarlett Courtney, Adam Courting, Lucy Reynolds, Ashleigh Hadadd, David Hounslow, Sinead MacInnes, Juliet Cowan and Marc Danbury

Written by Matthew Broughton
Produced and Directed by James Robinson
A BBC Cymru Wales Production