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 Lucy Cohu as Alice Carter Luke Perry as David Davies Susan Brown as Bridget Spears Ian Gelder as Mr Dekker Julia Joyce as Holly Frobisher Madeleine Rakic-Platt as Lilly Frobisher Bear McCausland as Steven Carter Liz May Brice as Johnson Hilary MacLean as Anna Frobisher Rhodri Lewis as Johnny Davies Aimee Davies as Mica Davies Louise Minchin as Newsreader Paul Copley as Clemet McDonald Gregory Ferguson as Young Clem Simon Poland voices 456 Colin McFarlane as General Pierce Ben Loyd Holmes as Operative Charles Abomeli as Colonel Augustus Oduya Anthony Debaeck as French Newsreader Lachele Carl as Trinity Wells Rachel Ferjani as Parliamentary Secretary Christopher James as Press Officer Patrice Etienne as Sandwich Shop Man