In the final episode of a three-part mini festive special, Mark Billingham is joined by Silent Witness' William Gaminara who played Professor Leo Dalton in the pathology crime drama alongside a couple of stints on the classic long-running police show The Bill.
William tells us what it's like having to play expert roles, when the lines blur between these expert roles and real life, and the horror of working with pig organs.
Meanwhile, Paul Hirons visits Eric Richard who played Sergeant Bob Cryer in The Bill over 17 years. We hear what it's like to star in the ever-popular series, the thinking behind the iconic show's production and what it was like playing a classic NCO.
Every episode we ask our guests to bring along some top crime recommendations, and first up William brought Patricia Highsmith's The Sweet Sickness to the table, what he describes as a fantastic book that's a "really quite detailed, quite nasty, inward looking, beautifully written crime story." In terms of TV show, William suggests Making A Murderer, saying "it has all the ingredients of a fictional crime drama with the added impetus that it's real!"