Bert sees an advert in the paper for a new caretaker at the Transport Research Institute. Looking for a better-paid job and fancying himself as an inventor, Grandad sets to work on his new creations - including wine-powered rocket fuel.
| Name | Type | Role | |
|---|---|---|---|
| Bob Block | Writer | ||
| Pamela Cundell | Guest Star | ||
| Priscilla Morgan | Guest Star | ||
| Jeremy Swan | Director |