Crossing The Line

When the projectionist dies in a fire in his projection room at the cinema it soon becomes apparent he was murdered. Blake finds in the projectionist room highly flammable 16mm film partially destroyed. A bill found on the dead man for a four poster bed delivered to a derelict mansion owned by Patrick Tyneman's son. Restoring some of the film reveals a pornographic film and Mattie knows one of the participants. Jean has a possible suitor in a fireman who was in the cinema and tried to save the projectionist's life.