 Andrew GarfieldRobin Cavendish | Robin Cavendish |
 Claire FoyDiana Cavendish | Diana Cavendish |
 Hugh BonnevilleTeddy Hall | Teddy Hall |
 Tom HollanderBloggs Blacker / David Blacker | Bloggs Blacker / David Blacker |
 Miranda RaisonMary Dawney | Mary Dawney |
 Dean-Charles ChapmanJonathan | Jonathan |
 Diana RiggLady Neville | Lady Neville |
 Ed SpeleersColin Campbell | Colin Campbell |
 Emily BevanNurse Margaret | Nurse Margaret |
 Ben Lloyd-HughesDr. Don McQueen | Dr. Don McQueen |
 Roger Ashton-GriffithsHospital Chaplain | Hospital Chaplain |
 Camilla RutherfordKatherine Robertson | Katherine Robertson |
 Penny DownieTid | Tid |
 Amit ShahDr. James Khan | Dr. James Khan |
 David WilmotPaddy | Paddy |
 Patrick GodfreyMr. Tolland | Mr. Tolland |
 Steven O'DonnellHarry Tennyson | Harry Tennyson |
 Lorraine AshbourneFirst Woman | First Woman |
 Rosie CavalieroSecond Woman | Second Woman |
 Stephen ManganDr. Clement Aitken | Dr. Clement Aitken |
 Kiera BellBallroom Dancer (uncredited) | Ballroom Dancer (uncredited) |
 Honey HolmesRobin's Bedside Guest (uncredited) | Robin's Bedside Guest (uncredited) |
 Ty HurleyAmbulance Man (uncredited) | Ambulance Man (uncredited) |
| HHarry AttwellMechanic | Mechanic |
 Mark UnderwoodPatient 1 (uncredited) | Patient 1 (uncredited) |
 Charlene DurrantNurse (uncredited) | Nurse (uncredited) |
 Adam GanneGerman Hospital Official | German Hospital Official |
 Charles StreeterChief Medic Lyneham | Chief Medic Lyneham |
| SSimon NorthWedding Guest (uncredited) | Wedding Guest (uncredited) |
 Jason FarriesRobin's Friend / Guest (uncredited) | Robin's Friend / Guest (uncredited) |
