The acting was superb but the casting of some of the supporting actors spoiled it for me. Unlike many TV dramas, it was very true to life and you very quickly got to hate the smarmy husband of Dr. Foster who fed her lie after lie in an effort to cover up his affair, At first, we believed him but later found out what a devious rat he was, It was the reality of the perfect marriage that went horribly wrong that reminded us of real-life people who we knew who went through similar and suffered badly, including ourselves, that got to us. Ultimately it became hard to watch, because of the acting skills of the lead characters. The boy in it loses trust in both his parent's and suffers badly as many children do when their parent's fall out of love and cheat on each other, Glad we saw it, but I wouldn't recommend to anyone in an unstable relationship.