Guest Stars Tom Price as Andy Davidson Cush Jumbo as Lois Habiba Peter Capaldi as John Frobisher Katy Wix as Rhiannon Davies Nicholas Farrell as Brian Green Luke Perry as David Davies Lucy Cohu as Alice Carter Ian Gelder as Mr Dekker Susan Brown as Bridget Spears 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