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