Rose Williams
as Charlotte Heywood
Anne Reid
as Lady Denham
Kris Marshall
as Tom Parker
Kate Ashfield
as Mary Parker
Crystal Clarke
as Miss Georgiana Lambe
Jack Fox
as Sir Edward Denham
Turlough Convery
as Arthur Parker
Kevin Eldon
as Mr. Hankins
Charlotte Spencer
as Esther Denham
Lily Sacofsky
as Clara Brereton
Ben Lloyd-Hughes
as Alexander Colbourne
Flora Mitchell
as Leonora Colbourne
Eloise Webb
as Augusta Markham
Adrian Scarborough
as Dr Fuchs
Sandy McDade
as Miss Beatrice Hankins
Flo Wilson
as Mrs Wheatley
Theo James
as Sidney Parker
Sophie Winkleman
as Lady Susan de Clemente
Alexander Vlahos
as Charles Lockhart
Matthew Needham
as Mr. Crowe
Alexandra Roach
as Diana Parker
Mark Stanley
as Lord Babbington
Rosie Graham
as Alison Heywood
Leo Suter
as Young Stringer
Frank Blake
as Captain Declan Fraser
Maxim Ays
as Captain William Carter
Tom Weston-Jones
as Colonel Francis Lennox
Cai Brigden
as Ralph Starling
James Bolam
as Rowleigh Pryce
Edward Davis
as Lord Harry Montrose
Emma Fielding
as Lady Montrose
Alice Orr-Ewing
as Lydia Montrose
Jyuddah Jaymes
as Otis Molyneux
Liam Garrigan
as Samuel Colbourne
Sharlene Whyte
as Agnes Harmon