Guest Stars Grace Hogg-Robinson as Tess Marshall Joshua Hogan as Barney Marshall Ellie Kendrick as Stephanie Lodge Emmanuel Imani as James Odubajo Pearce Quigley as Nick Dunbar Molly McGlynn as Jane Allum Yemisi Oyinloye as Eloise Porter Max Parker as John Cripps Sam Crane as Dominic Knight Denise Moreno as Isabella Ruby Barker as Georgia Nixon Caroline Hayes as Minister for Business Vera Chok as Maria (Air Traffic Controller)