Lazy repairman Des Kinvig's life changes when he imagines meeting a glamorous alien from Mercury, who looks a lot like his latest customer Miss Griffin.
| Actor | Role |
|---|---|
 Tony HaygarthDes Kinvig | Des Kinvig |
| PPatsy RowlandsNetta Kinvig | Netta Kinvig |
 Prunella GeeMiss Griffin | Miss Griffin |
 Colin JeavonsJim Piper | Jim Piper |
 Danny SchillerSagga | Sagga |
 Stephen BentLoon | Loon |
| AAlan BodenhamBat | Bat |
| BBetty HardyMrs. Snell | Mrs. Snell |