First broadcast 8th January 2018.<br /><br />Thomas and Jack are surprised to see Nikki back at The Lyell, the disappearance of her friend Sally forces her to face her back after her harrowing experience in Mexico.<br /><br />Emilia Fox - Dr. Nikki Alexander<br />David Caves - Jack Hodgson<br />Liz Carr - Clarissa Mullery<br />Richard Lintern - Dr. Thomas Chamberlain<br />Samantha Baines - Gemma King<br />David Bamber - Brian Hawke<br />Steve Barnett - The Walker<br />Pippa Bennett-Warner - DC Heidi Bailey<br />Natalie Burt - Katit Hawke<br />Lindsey Campbell - Suzie Tudor<br />Lucy Chappell - Young Anna<br />Alan David - Mick Porter<br />Emma Fielding - Sally Vaughan<br />Susannah Fielding - Emma Singh<br />Kelly Hunter - Gwen Blair<br />Javed Khan - Shoaib Singh<br />Alex Macqueen - DI Guy Bernhardt<br />Anna Madeley - Anna Lawson<br />Fergus O'Donnell - Angus Merrick<br />Charlotte Orchard - Fiona Tudor<br />Elena Orchard - Fiona Tudor<br />Duncan Pow - Gary Hadlow<br />Julian Rhind-Tutt - David Cannon<br />Deborah Rock - NCA Employee<br />Adam Sina - Livtar Singh (as Adam Henderson Scott)<br />Peter Sullivan - DCI Pete Hollis<br />Maxi Tilyard - Greg Tudor<br />Ruth Clarson - Soco<br />Tobias James-Samuels - Arm Responses<br />Richard Cant - Simon Heather<br />James Cooney - Young Gary<br />Alistair Toovey - Young Livtar<br />Jon Wennington - Funeral director
