- Unknown:
- Snoo Wilson
- Unknown:
- John Betieman
- Played By:
- Alex Tregear
- Played By:
- Emily Wachter
- Played By:
- Jason Chan
- Played By:
- Robert Hastie
- Played By:
- Stuart McLoughlin
- Director:
- Jay Owen Director Ned Chaillet
- John Betjeman:
- Anthony Calf
- Penelope:
- Anastasia Hille
- Edna:
- Patricia Leventon
- Sir Oswald Mosely:
- Andrew Woodall
- Diana Mosley:
- Victoria Woodward
- Betterton/Lord Powerscourt:
- Ian Masters
- Officer MI6/Sweney:
- Owen Sharpe
- Susan Hilton:
- Katherine Igoe
- James Blair/Declan:
- Stephen Hogan
- Dannan:
- Renee Weldon
- Bridy:
- Aoife McMahon
- Titanicus:
- Gerard Murphy
- Eamon de Valera/MacNamara:
- John Rogan
- Laurence Olivier:
- Nicholas Boulton
- Olawalu:
- Jimmy Aklngbola
- Princess Sobietska Ndidi:
- Del Fattl
- Conor:
- Andrew Scott
- GuyBurgess:
- Tam Williams
- Evelyn Waugh:
- Snoo Wilson