A familiar scene for home brew enthusiasts and their long suffering families, acted out by some familiar faces.

Guinness might not give you strength, but this strange brew could kill what's inside of you. The recent homebrew revival has taken over many a kitchen, but in 1975 the take home bottle in the supermarket was still a relative novelty. The familiar faces in this commercial belong to All Creatures Great and Small's Christopher Timothy and bit-part player Lea Brodie.

Bottled Guinness TV advertisement. A man is brewing beer in his kitchen.
He tastes it, but he doesn't look happy. His wife comes back from shopping
and pours him a glass of Guinness. He enjoys the Guinness, but tries not to
show her his satisfied smile.