Suranne Jones (Unforgiven, Coronation Street) leads an impressive ensemble cast in Gwyneth Hughes’ (Miss Austen Regrets, Cherished) gripping new drama serial Five Days, which returns to BBC One in 2010, it was announced today.

Kate Harwood, BBC Controller Drama Series & Serials, says: “Once again Gwyneth has delivered a tense emotional drama about a rich range of characters which will leave viewers desperate to find out what happens next in a complex story of mystery and moment.”

A tiny newborn baby is abandoned in the toilets of a Yorkshire hospital. At the same time, the Trans-Pennine commuter train is halted by a suicidal jumper. Are they connected?

From this moment on, the lives of those onboard the train and in the hospital will be changed irrevocably, not least for DC Laurie Franklin (Suranne Jones), off-duty that day but travelling on the train with her mum (Anne Reid), who is recently diagnosed with Alzheimer’s.

Laurie likes tying up loose ends. And if she can prove a connection between the body and the baby she will be happy.

But things never turn out quite the way we expect. Who is the baby’s mother? And who is the jumper? And was it just a simple case of suicide – or was it really a murder?

Five Days is an atmospheric ensemble drama; a mystery which unfolds over the five most significant days of the police investigation into these two mysteries.

It is set in the heart of urban Yorkshire – a melting pot of tensions and relationships within a multicultural landscape.