David Simeon) to a tiny, rural village to investigate a mystery illness affecting the pigs belong to Mr. Beeley (played by James Bond's boss, Bernard Lee). The poorly pigs aren't the only problem in the village with drought, and sickness amongst the villagers adding to their woes. Spurning the scientific minded approach of the outsider vet the villagers have already decided on the cause of the murrain, local odd bod and suspected witch, Mrs. Clemson (Una Brandon-Jones).
In discussions of Kneales' work 'Murrain', if mentioned at all, is often relegated to a footnote, eclipsed by it's more exuberant siblings like 'Quatermass', 'The Stone Tape' or 'Beasts', but sometimes there's gold in a footnote and I think that's the case here. 'Murrain' with the constraints of it's obviously limited budget makes for a tightly controlled and concentrated exploration of Kneale's interests bereft of the more overt science fiction and horror elements of later work such as 'Baby' and 'The Quatermass Conclusion' and is all the better for it.
Murrain is included in the box set of Kneale's series 'Beasts' which you can buy here - Beasts - The Complete Series [DVD]  - or you can watch it below.