First broadcast 9th/10th January 2017.<br /><br />When teacher Lucy Chatham is abducted Nikki and Jack help police officers Andy Steemson and Karen Wretzy investigate the circumstances of her disappearance whilst Thomas assists abrasive DS Maureen Steele when ex-addict Tina Lunt is murdered.<br /><br />Emilia Fox - Dr. Nikki Alexander<br />David Caves - Jack Hodgson<br />Richard Lintern - Dr. Thomas Chamberlain<br />Liz Carr - Clarissa Mullery<br />Nathalie Buscombe - Lucy Chatham<br />Pippa Duffy - Alice<br />Daisy Edgar-Jones - Jessica Timpson<br />Alex Felton - Jasper Lampton<br />Todd Von Joel - Bearded Mechanic<br />Sidney Kean - Maconi<br />Natalie Lester - Tina Lunt<br />Darren Morfitt - DCI Andy Steemson<br />Saskia Reeves - DS Maureen Steele<br />Anneika Rose - DS Karen Wretzy<br />Dominic Rowan - Nick Timpson<br />Michael Ryan - Wesley Beale<br />Steve John Shepherd - Alec Porter<br />Anna Wilson-Jones - Ellie Timpson<br />George Alagiah - News reader<br />Connor Arnold - Simon<br />Tamer Doghem - Ali the mechanic<br />Jack Gogarty - Young Alec<br />Tom Leach - Young Nick<br />Ania Marson - Grace Hockney<br />Struan Rodger - Mike Liston<br />Tamsin Topolski - Young Ellie
