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