Guest Stars Tom Price as Andy Davidson Peter Capaldi as John Frobisher Cush Jumbo as Lois Habiba Luke Perry as David Davies Nicholas Farrell as Brian Green Susan Brown as Bridget Spears Katy Wix as Rhiannon Davies Lucy Cohu as Alice Carter Ian Gelder as Mr Dekker Julia Joyce as Holly Frobisher Bear McCausland as Steven Carter Madeleine Rakic-Platt as Lilly Frobisher Liz May Brice as Johnson 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 Ashley Hunt as Recovery Worker Robert Shelly as Sentry Fay McDonald as Mother Libby Liburd as Barmaid Quill Roberts as Guard Osi Okerafor as Kodak Emmanuel Ighodaro as Paramedic