 Michael CraigDr. Richard Hare | Dr. Richard Hare |
 Virginia MaskellDr. Nicola Barrington | Dr. Nicola Barrington |
 Leslie PhillipsDr. Tony Burke | Dr. Tony Burke |
 James Robertson JusticeSir Lancelot Spratt | Sir Lancelot Spratt |
 Nicholas PhippsDr. Clive Cardew | Dr. Clive Cardew |
 Carole LesleyMiss Kitten Strudwick | Miss Kitten Strudwick |
 John Le MesurierDr. Mincing | Dr. Mincing |
 Joan SimsDawn | Dawn |
 Reginald BeckwithWildewinde | Wildewinde |
 Liz FraserLeonora | Leonora |
 Ambrosine PhillpottsLady Spratt | Lady Spratt |
| FFenella FieldingMrs. Tadwich | Mrs. Tadwich |
 Irene HandlProfessor MacRitchie | Professor MacRitchie |
 Esma CannonRafia Woman (uncredited) | Rafia Woman (uncredited) |
 Ronnie StevensMr. Harold Green | Mr. Harold Green |
 Nicholas ParsonsDr. Hinxman | Dr. Hinxman |
 Sheila HancockLibrarian (uncredited) | Librarian (uncredited) |
 Rosalind KnightDoctor (uncredited) | Doctor (uncredited) |
 Patrick CargillCar Salesman (uncredited) | Car Salesman (uncredited) |
 Joan HicksonNurse (uncredited) | Nurse (uncredited) |
 Moira RedmondNurse Sally Nightingale | Nurse Sally Nightingale |
 Michael WardDr. Flower | Dr. Flower |
 Angela BrowneSusan (uncredited) | Susan (uncredited) |
 Avis BunnageMrs. Mimp (uncredited) | Mrs. Mimp (uncredited) |
 Cyril ChamberlainShower Steward (uncredited) | Shower Steward (uncredited) |
 Bill FraserPolice Sergeant (uncredited) | Police Sergeant (uncredited) |
 Warren MitchellHaystack Club Manager (uncredited) | Haystack Club Manager (uncredited) |
 John JunkinPoliceman (uncredited) | Policeman (uncredited) |
 Marianne StoneHospital Sister (uncredited) | Hospital Sister (uncredited) |
 John Moulder-BrownMimps Boy (uncredited) | Mimps Boy (uncredited) |
