Egghead creates a robot double of his sister.
| Actor | Role |
|---|---|
 Keith ChegwinEgghead Wentworth | Egghead Wentworth |
| JJulie CollinsElspeth Wentworth | Elspeth Wentworth |
| TTracey CollinsSamantha | Samantha |
 Richard WattisMr. Wentworth | Mr. Wentworth |
 Robert DorningThe Mayor | The Mayor |
 Johnny VyvyanCyril | Cyril |
| HHonor ShepherdGrretchen Boyle | Grretchen Boyle |
 Larry MartynBert | Bert |
 Josephine TewsonMrs. Wentworth | Mrs. Wentworth |