Main •
Jonah Hauer-King as Harry Chase, an interpreter at the British embassy in Warsaw who is later commissioned into the British Army, and joins the
SOE. •
Helen Hunt (series 1) as Nancy Campbell, an American journalist struggling to broadcast the truth from Berlin. •
Sean Bean (series 1) as Douglas Bennett, a bus conductor, pacifist and
shell-shocked veteran of the
Battle of the Somme, and father to Lois and Tom. •
Lesley Manville as Robina Chase, Harry's wealthy and emotionally repressed mother. •
Julia Brown as Lois Bennett, a 21-year-old factory worker and talented singer who later joins the
Entertainments National Service Association. In series two, Lois is an ambulance driver. •
Zofia Wichłacz as Kasia Tomaszeski, a waitress from Warsaw, with whose family Harry lodges, who later joins the
Polish Resistance •
Brian J. Smith (series 1) as Webster O'Connor, a gay American doctor based in Paris and Nancy's nephew. •
Parker Sawyers as Albert Fallou, a Parisian jazz saxophonist and Webster's lover. •
Blake Harrison as Sergeant Stan Raddings, Harry's platoon sergeant. •
Ewan Mitchell as Tom Bennett, Lois's older brother, a petty criminal who later joins the Royal Navy. • Mateusz Więcławek as Grzegorz Tomaszeski, Kasia's sickly younger brother who joins the Polish army with his father. • Eugénie Derouand as Henriette Guilbert, a nurse at Webster's hospital in Paris, secretly Jewish. •
Mark Bonnar (series 2) as Sir James Danemere, a civil servant who is billeted at the Chase house. •
Ahad Raza Mir (series 2) as Rajib Pal, the captain of a
sapper unit in the
British Indian Army that is stationed in
North Africa. • Miriam Schiweck (series 2) as Marga Kühne, a 16-year-old German schoolgirl and member of the
League of German Girls. •
Gregg Sulkin (series 2) as David, a Jewish
RAF fighter pilot stationed in Manchester.
Supporting •
Yrsa Daley-Ward as Connie Knight, a close friend, colleague and musical partner of Lois. • Eryk Biedunkiewicz as Jan Tomaszeski, Kasia's youngest brother, a schoolboy. •
Cel Spellman as Private Joe Broughton, a member of Harry's Platoon from
Leeds. •
Benedict Taylor (series 1) as Dr Drake, head of a mental hospital in Manchester. • Jonathan McGuiness (series 1) as
Sir Oswald Mosley, the leader of the
British Union of Fascists. •
Tomasz Kot (series 1) as Stefan Tomaszeski, a veteran of
World War I and father of Kasia, Jan and Grzegorz, who rejoins the Polish army. •
Patrick Kennedy (series 1) as Campbell, the captain of
HMS Exeter. • Matthew Romain (series 1) as Geoff, a shellshocked soldier Harry encounters in France. •
Prasanna Puwanarajah (series 1) as Major Taylor, a commander of the
Special Operations Executive. •
Charlie Creed-Miles (series 1) as David Walker, Harry's superior at the Warsaw embassy. • Buom Tihngang (series 1) as Demba, a Senegalese soldier whom Harry meets in France. •
Agata Kulesza (series 1) as Maria Tomaszeski, Stefan's wife and mother of Kasia, Grzegorz and Jan. •
Jack Deam (series 1) as Ted, manager of Lois and Connie's ENSA unit. •
Benjamin Wainwright (series 1) as Randy O'Connor, an American fighter pilot in Vernon's squadron and Webster's brother. • Helene Grass (series 1) as Frau Pessler, one of Uwe's employees, a committed Nazi. • Bruno Alexander (series 1) as Klaus Rossler, Claudia and Uwe's son, a German soldier. •
Arthur Darvill (series 1) as Wing Commander Vernon Hunter, an RAF fighter pilot. • Matthew Aubrey (series 1) as Private Taffy Morgan, a member of Harry's platoon. •
Borys Szyc (series 1) as Konrad, a Polish army soldier. •
Ansu Kabia (series 1) as Eddie Knight, Connie's husband, a jazz trumpeter. • Dora Zyogouri (series 1) as Hilda Rossler, the epileptic daughter of Claudia and Uwe. •
Tomasz Ziętek (series 1) as Tomasz, a colleague of Kasia in the resistance. • Victoria Mayer (series 1) as Claudia Rossler, a German mother living in Berlin, struggling to contain the secret of her daughter's epilepsy. • Johannes Zeiler (series 1) as Uwe Rossler, Claudia's husband who runs a textile firm. •
Max Riemelt as (series 1) Schmidt, Nancy's Nazi censor and minder in Berlin. • Arthur Choisnet (series 2) as Luc, a
communist university student and Henriette's brother. • Grace Chilton (series 2) as Joyce Spicer, the housekeeper of the Chase household. • Forrest Bothwell (series 2) as George, a young
Northern Irish soldier stationed in North Africa. •
Jonathan Harden (series 2) as Captain Briggs, the commanding officer of the British platoon stationed in
Egypt and
Libya. • James Backway (series 2) as Gordon, an RAF commanding officer. • Jake Douglas (series 2) as Stephen, an RAF pilot. • Geraint Downing (series 2) as Shortbread, an RAF fighter pilot and friend of David. • (series 2) as Herr Kühne, Marga's father who tries to protect her from the Nazis. • Friederike Ott (series 2) as Frau Kühne, Marga's mother. • Carl Grübel (series 2) as Ralf Kühne, Marga's brother and a
Luftwaffe bomber. • Beat Marti (series 2) as Herr Trutz, Marga and Gertha's school teacher. • Jay Sajjid (series 2) as Ishwar, an Indian soldier in Rajib's unit. • Johanna Götting (series 2) as Gertha, the best friend of Marga who is strongly opposed to the Lebensborn programme. • Andreas Schröders (series 2) as Dr Kommandant, a Lebensborn doctor. • Inga Dietrich (series 2) as Astrid Mutti, an employee who works at a Lesbensborn site in
Brandenburg • Kevin Kiernan-Molloy as Sollo, an
Australian soldier serving in North Africa. • Agnieszka Podsiadlik (series 2) as Irena Lewandowska, a Polish refugee from
Warsaw living in
Manchester. • Ben Allen (series 2) as Tam, an
MI5 operative. • Eric Godon (series 2) as Monsieur Berthaud, an elderly French man who aids the resistance. • Béatrice De Staël (series 2) as Madame Berthaud, an elderly French woman who, along with her husband, aids the resistance. •
Lily Sacofsky (series 2) as Pearl, an ATS worker at the desert hospital in
Cairo. ==Episodes==