Glen, a complete stranger, appears at the door of Elizabeth Carter, a middle-aged woman, and claims to be the illegitimate son she gave away at birth.
| Actor | Role |
|---|---|
 Anna CropperElizabeth Carter | Elizabeth Carter |
 Tim CurryGlen | Glen |
 John CarsonTom Carter | Tom Carter |
 Bob HoskinsBlake (Tom's Boss) | Blake (Tom's Boss) |
 Carol MacReadyDorothy | Dorothy |
 John HorsleyRonnie | Ronnie |