The London Underground Killer

In a South London police station, officers are shocked to discover a man has been murdered in a locked cell. The suspected killer is his cellmate, a homeless man named Kieran Kelly, in custody for theft. Police interview 53-year-old Kelly, who has a long rap sheet for petty crimes, and he calmly confesses to killing the man in the cell, but detectives are unprepared for what comes next.

• Jo ConchieDirector

• Ian BrownSelf - Retired Detective Superintendent, Metropolitan Police
• Robert MulhernSelf - Journalist
• Jeff EdwardsSelf - Former 'Daily Mirror' Crime Correspondent