Guest Stars Tom Price as Andy Davidson Cush Jumbo as Lois Habiba Peter Capaldi as John Frobisher Luke Perry as David Davies Nicholas Farrell as Brian Green Katy Wix as Rhiannon Davies Susan Brown as Bridget Spears Lucy Cohu as Alice Carter Ian Gelder as Mr Dekker Julia Joyce as Holly Frobisher Rhodri Lewis as Johnny Davies Bear McCausland as Steven Carter Aimee Davies as Mica Davies Hilary MacLean as Anna Frobisher Liz May Brice as Johnson Madeleine Rakic-Platt as Lilly Frobisher Louise Minchin as Newsreader Gregory Ferguson as Young Clem Paul Copley as Clemet McDonald Simon Poland voices 456 Fay McDonald as Mother Quill Roberts as Guard Libby Liburd as Barmaid Osi Okerafor as Kodak Ashley Hunt as Recovery Worker Robert Shelly as Sentry Emmanuel Ighodaro as Paramedic