Guest Stars Ken Bones as Lord Halifax Alexia James as Lotte Perlmutter Jemma Churchill as Nanny Lyons Lucy Cohu as Sylvia Fuller Ian Barritt as Dr. Gascoine Niamh McGrady as Enid Soaper Miles Richardson as David Silverman Robbie Jarvis as Jack Kennedy Tom Bennett as Tommy Soaper William Hope as Ambassador Kennedy Nancy Crane as Mrs. Rose Kennedy Joseph Howse as Cyril Soaper Timo Willman as Hitler Youth