As Mowbray and Henderson head for trial, it appears that someone has been providing the prosecution with inside information. A senior police officer advises Mowbray to place truth over loyalty in the courtroom. Outside the courtroom, the killing continues.

Jackson is released from prison and seeks to cash in on his celebrity, while the detectives have to sift through all the old evidence again. Finally, they get a breakthrough--a link between the latest killing and one of the Welsh murders.