Donal MacIntyre: Unsolved

In 2003, Daniel Entwistle disappeared during a bank holiday weekend in Great Yarmouth.

Supermarket worker and gardener Alan Wood was murdered in his own home in Lound, Lincolnshire.

Donal investigate the case of Natalie Pearman, who was found dead after working in the red light district in Norwich.

Donal investigate the disappearance of American student Annie McCarrick after heading to the Dublin mountains in 1993.

The morning after Barry Rubery returned home in 2010, he was found with fatal head injuries, his hands tied behind his back. Despite an extensive investigation, no one has ever been charged with his murder.

Claudia Lawrence was reported missing in 2009, after failing to turn up to work. She has not been heard from since, nor has her body ever been found.

Valerie Graves was murdered whilst house-sitting a £1.6 million property.

Trevor Deely vanished from the streets of Dublin in December 2000. His disappearance was the subject of a high-profile search and publicity campaign, but no trace was ever found.

Nobody has been convicted for the murder of Penny Bell in a leisure centre car park. She had withdrawn £8,500 from her bank the day before, which was never found.

In this series Donal MacIntyre revisits and explores unsolved cases.

Caroline Glachan's battered body was found face down in a river, having suffered extensive head injuries. Her killer has never been found.