Guest Stars Anna Maxwell Martin as Kelly Major Rosie Cavaliero as DCS Dennett Amanda Payton as Dr. Alison Parfit Michelle Greenidge as DS Judith Papastathopoulos Tracy-Ann Oberman as Helen Chalmers Michael Armstrong as Officer Mike Vinette Robinson as Professor Sarah McAllister Louise Stewart as SOCO John Cummins as Duncan Pugh Daniel Lawrence Taylor as Searle
