An ancient church is being dismantled and moved to a new location, stone by stone. One of the gargoyles from the stones falls into the possession of a mother who takes the stone man back to her family. Soon after, four strangers show up in the village and the Sogood & Firkettle children seem to be the only ones who question the mysterious things that begin to happen. This film was originally broadcast across six 25 minute episodes with a total runtime of 150 minutes. A few years later, the US cable network Nickelodeon edited the miniseries into a 2 hour (including commercials) movie block. This 2 hour edited version was shown throughout the 1980s on US television.
Unfortunately the movie The Witches and the Grinnygog is not yet available on Disney Plus.
| Sound | James Harpham | Music |
| Costume & Make-Up | Cecilia Doidge | Costumer |
| Costume & Make-Up | Romayne Wightman | Makeup Artist |
| Art | John Hamon | Graphic Designer |
| Art | Peter Bull | Assistant Art Director |
| Directing | Tim Spring | Stage Director |
| Directing | James Greville | First Assistant Director |
| Editing | Nigel Bate | Editor |
| Camera | Ken Brinsley | Camera Operator |
| Sound | Jim Biddle | Sound Mixer |
| Crew | Michael D. Smith | Lighting Camera |
| Production | Graham Curtis | Production Accountant |
| Production | Peter Price | Unit Manager |
| Production | John Barlow | Unit Manager |
| Production | Barbara Goodall | Production Secretary |
| Directing | Gillian Wheeler | Continuity |
| Sound | Tony Cunningham | Sound Re-Recording Mixer |
| Camera | Julian Barber | Focus Puller |
| Writing | Dorothy Edwards | Book |
| Writing | Roy Russell | Screenplay |
| Production | Anna Home | Executive Producer |
| Production | John Newton Clarke | Production Designer |
| Directing | Diarmuid Lawrence | Director |