UCOS reopen the thirty year old murder of porn king Jim Hockney when his daughter Sara reveals that a DNA test proves she is not his daughter. Her mother Jane cannot provide any answers as she and Jim both had several sex partners. Jim's girlfriend at the time, singer Angela Gold, was charged but acquitted of the murder and now seems to have disappeared. Brian's replacement Dan Griffin arrives, albeit late and is initially treated with hostility by Gerry, who thinks he is a spy. Nonetheless Dan tracks down Angela though in the meantime Sandra learns that Jim's brother Colin sold Jim's porn empire very shortly after his death to his main rival Gavin Reason. Furthermore Jane and Gavin were lovers, Gavin proving to be Sara's father though he was unaware at the time. However it is Gerry's collection of some of Jim's old films, supposedly confiscated by Vice Squad, that identifies the murder weapon and leads to the culprit. The case closed the team watch Angela perform at Ronnie Scott's Jazz Club.

Diecisiete años antes, el primer caso de Sandra involucró la desaparición, nunca resuelta, de Lesley Hewitt, estudiante de música, y ahora a la hermana de Lesley, Emma, le han enviado una foto de Lesley caminando en un parque justo antes de que desapareciera. Sandra cree que un corredor en la foto era un asesino en serie responsable de la muerte de otras jóvenes, posiblemente trabajando con una cómplice femenina, ya que Emma dice que a Lesley le ofrecieron un trabajo antes de que desapareciera. La ex modelo Annie Banks y el dueño de la librería Stuart McKelvie también están en la foto, tomada por Greg Banks, un fotógrafo recientemente fallecido cuyo estudio contiene varias fotos de mujeres que fueron secuestradas y asesinadas. Annie y Stuart inicialmente afirman no conocerse, pero Sandra desmonta sus historias y descubre que Annie sabe quién es el corredor. Después de concluir el caso, Sandra deja UCOS para trabajar con Max Clement.