When Lady Pagwell dies, leaving a legacy to fund local inventing, Professor Branestawm thinks his money troubles are over. But scheming councillor Haggerstone insists an inventing contest be held to decide who gets the cash.
| Actor | Role |
|---|---|
 Madeline HollidayConnie Whistlestop | Connie Whistlestop |
 Vicki PepperdineMrs Flittersnoop | Mrs Flittersnoop |
 Simon DayColonel Dedshott | Colonel Dedshott |
 David MitchellCouncillor Harold Haggerstone | Councillor Harold Haggerstone |
 Sophie ThompsonAggie Whistlestop | Aggie Whistlestop |
 Diana RiggLady Pagwell | Lady Pagwell |
 Steve PembertonProfessor Algebrain | Professor Algebrain |
 Matt BerryProfessor Awfulshirt | Professor Awfulshirt |
| CCharlie HigsonThe Mayor | The Mayor |
 Adrian ScarboroughThe Vicar | The Vicar |
 Rosie CavalieroProfessor Mary Oxford | Professor Mary Oxford |
| DDoreen IngletonMiss Silt | Miss Silt |
| AAlexa MordenMiss Pagwell 1953 | Miss Pagwell 1953 |
 Maya SondhiRadio Producer | Radio Producer |
| LLily May PalmerMaisie | Maisie |
 Jason ForbesPC Peasey | PC Peasey |
 Justin EdwardsRadio Announcer | Radio Announcer |
 Sandy JohnsonPhotographer | Photographer |
 Harry HillProfessor Branestawm | Professor Branestawm |