Who murdered Hayley?

Unforgotten writer Chris Lang talks us through the suspects…

chris lowe James Fleet ‘Chris’ life unravelled just after that millennium night, so it must have been something catastrophic to cause that. Is the way he is now the result of his guilt?’ Dr Tim Finch

Alex Jennings ‘With Tim, you’ve got the allegation of professional misconduct – was he really abusive? Ex-wife Derran is clearly unstable – but are there any nuggets of truth in what she says?’ PeTe carr Neil Morrissey ‘Before his death, Pete admitted to doing some dreadful things, such as stealing from the disabled – but does that make him a killer? We may never find out.’ James hollis Kevin McNally ‘We’ve learnt there’s a secret James and his son Eliot have been keeping all these years, but is there more to it? Could Eliot be the killer? Is James just trying to protect his son? Or were they in it together?’ mel hollis Sara Stewart Derran Finch SiobhanRedmond ‘There is definitely a huge amount of dysfunction from both women, and clearly they are still resentful and angry. Could they be guilty?’ Jessica reiD

Bronagh Waugh ‘Jessica is a brutal, daily reminder for her parents of what they’ve lost.

This is a simple story of tragic loss – or is it?’ aDrian mullery Gerald Kyd ‘Hayley’s then boyfriend was quizzed by the police but never charged, and this story explores how a man’s life was ruined by a single accusation and his time spent in the media spotlight.’ Dci John BenTley

Alastair Mackenzie ‘In charge of the original investigation, was he involved in the crime? And did he wreck the case deliberately?’