David Anthony, a Harley Street physician, swaps duties with his brother, a medical missionary in Africa.
| Actor | Role |
|---|---|
 Derek BondDavid Anthony | David Anthony |
| JJean PattersonValerie Maitland | Valerie Maitland |
| DDerek ElphinstoneRichard Anthony | Richard Anthony |
| AAnne BrookeBeryl Jeffries | Beryl Jeffries |
| GGrace GavinMrs. Phillips | Mrs. Phillips |
| KKeith PyottSir Rudolph Gettins | Sir Rudolph Gettins |
| JJean Webster-BroughMrs. Waterhouse | Mrs. Waterhouse |
| GGrace Denbigh RussellMrs. Hallett | Mrs. Hallett |
| CConstance FraserMrs. Nettley | Mrs. Nettley |
| AAlban BlakelockMr. Harris | Mr. Harris |
| JJohn HowlettBill | Bill |
| PPeter FontainePeter | Peter |
| GGwynne WhitbyLady Marriot-Stokes | Lady Marriot-Stokes |
| AAnne HunterNot listed | Not listed |