Guest Stars Caroline O'Neill as Win Thursday Abigail Thaw as Dorothea Frazil Sara Vickers as Joan Thursday Simon Harrison as Ronnie Box Richard Riddell as DS Alan Jago Alison Newman as Viv Wall Sophie Winkleman as Isobel Humbolt Blake Ritson as Gabriel Van Horne Benjamin Wainwright as Professor Adam Drake Mary Stockley as Hildegard Slayton Katie Faye as Christine Chase Michael Parkhouse as TV Anchor Terenia Edwards as Marilyn Gidby Sasha Willoughby as Flora Humbolt Oliver Chris as Dr Elliot Wingqvist Charlotte Bradley as Mrs Trellis Sargon Yelda as Dr Larry Humbolt Robert Hands as Eric Gidby Ross Boatman as Mac Honeydew Alice Orr-Ewing as Natalie Wingqvist Matthew Cottle as Jeff Slayton Gabriel Payne as Matthew Humbolt
