When an English cartographer arrives in Wales to tell the residents of the Welsh village of Ffynnon Garw that their 'mountain' is only a hill, the offended community sets out to remedy the situation.
| Actor | Role |
|---|---|
 Hugh GrantReginald Anson | Reginald Anson |
 Tara FitzgeraldBetty | Betty |
 Colm MeaneyMorgan the Goat | Morgan the Goat |
 Ian McNeiceGeorge Garrad | George Garrad |
 Ian HartJohnny Shellshocked | Johnny Shellshocked |
 Kenneth GriffithReverend Jones | Reverend Jones |
| TTudor VaughanThomas Twp | Thomas Twp |
| HHugh VaughanThomas Twp Two | Thomas Twp Two |
 Robert PughWilliams the Petroleum | Williams the Petroleum |
 Robert BlytheIvor | Ivor |
 Garfield MorganDavies the School | Davies the School |
 Lisa PalfreyBlod Jones | Blod Jones |
| DDafydd Wyn RobertsTommy Twostroke | Tommy Twostroke |
 Ieuan RhysSergeant Thomas | Sergeant Thomas |
 Anwen WilliamsMavis | Mavis |
 David Lloyd MeredithJones the JP | Jones the JP |
 Howell EvansThomas the Trains | Thomas the Trains |
 Fraser CainsEvans the End of the World | Evans the End of the World |
| JJack WaltersGrandfather | Grandfather |
| HHarry KretchmerYoung Boy | Young Boy |
 Maisie McNeiceGirl in classroom | Girl in classroom |
 Nicholas McGaugheyNarrator (voice) | Narrator (voice) |