Fantastic stuff. I don't normally watch TV drama but this is very close to my heart.
I was working in he biochemistry labs at Oxford university at the time this drama is based in 1984 exactly where Prof Jeffries trained.
I was a Masters student running DNA sequences exactly like those in this programme. All the equipment, the gels, the black and white stripes on he films, trying to avoid getting irradiated. Its very very accurate and brilliant work by he drama makers.