Guest Stars Hayley Atwell as Freya Deverell Samuel West as Peter Scabius (Older) Ed Stoppard as Ben Leeping (Older) Conor Nealon as Logan Mountstuart (Child) Gillian Anderson as Wallis Simpson Julian Ovenden as Ernest Hemingway Tom Hollander as Prince of Wales Ken Bones as Mr. Mountstuart Emerald Fennell as Lottie Flaminia Cinque as Mrs. Mountstuart Kim Cattrall as Gloria Scabius Hugh Skinner as Lionel Mounstuart