It isn't very good, a few unexplained happenings, shadowy spectral apparitions, fingers around doors - a most disturbing looking Baptist church minister (who is a quite well known exorcist), & one more ordinary. Animals in distress and injured. The man in the family, Bill, obsessed with reading about and painting things to do with 'dark arts'. Definite signs of severe mental illness/psychosis which was terrifying for his wife.
The ending was sad in a low key way.
I won't bother to watch next week which will be a different story, also set in Wales.