Four Londoners are inseparably linked by their wartime experiences. In a time when the barriers of sexuality and social convention have been broken down, they enjoy a freedom never experienced before.
| Actor | Role |
|---|---|
 Anna Maxwell MartinKay Langrish | Kay Langrish |
 Claire FoyHelen Giniver | Helen Giniver |
 Jodie WhittakerVivian Pearce | Vivian Pearce |
 Anna Wilson-JonesJulia Standing | Julia Standing |
 Harry TreadawayDuncan Pearce | Duncan Pearce |
 JJ FeildRobert Fraser | Robert Fraser |
 Liam GarriganReggie Nigri | Reggie Nigri |
 Claudie BlakleyNancy Carmichael | Nancy Carmichael |
 Kenneth CranhamHorace Mundy | Horace Mundy |
 Jenna AugenIris Knight | Iris Knight |
 Neal BarryMr Bryant | Mr Bryant |
 Lucy BriersBinkie | Binkie |
 Richard CambridgePoliceman | Policeman |
| CChas EarlyPrisoner #1 | Prisoner #1 |
| RRichard HuwJames Imrie | James Imrie |
 Caitlin Innes EdwardsO'Neil | O'Neil |
 Phill LanghorneCyclist | Cyclist |
 Colin MaceHughes | Hughes |
 Stephen MatthewsAuntie Vi | Auntie Vi |
 Paul RitterMr Pearce | Mr Pearce |
 Kris SaddlerAirman | Airman |
 Alex WaldmannAlec Jennings | Alec Jennings |
| LLeona WalkerOrderly | Orderly |
 Phoebe Waller-BridgeLauren | Lauren |
 Tom Weston-JonesJack Brown | Jack Brown |