Guest Stars Kingsley Ben-Adir as Dr. Marcus Summer Christine Kavanagh as Karen Kenworthy Dave Hill as Larry Crowe Christopher Villiers as Noel Underwood Teresa Banham as Lorna Underwood John Woodvine as Alan Kenworthy Michael Hodgson as Thomas Kenworthy Co Starring Phoebe Thomas as Nicky Maxine Finch as Doctor Rob Jarman as David Kenworthy Wendy Patterson as Valerie Niek Versteeg as Paul Gordon Kane as Landlord Gary Kitching as Chip Shop Owner Victoria Inez Hardy as Amy Phil Corbitt as Taxi Driver Annmarie Hosell as Receptionist Maxie Peters as Security Officer