Guest Stars Marion Bailey as Hilda Bruce-Potter Matthew Marsh as Percy Walsh Anna Burnett as Linda Travers Estella Daniels as Elsie Watson Jennifer Kirby as Dr Gillian Nicholls Adam Ewan as Les Grant Ray Emmet Brown as John Peckett Anthony Flanagan as Flavian Creech Ben Bishop as Norbert 'Nobby' Hobbs Martin Hutson as Lawrence Yeager Will Sebag-Montefiore as Professor Patrick Stanton Adam Mirsky as Richard Blake Chirag Lobo as Asif Faradoon
