This is one of the most moving TV dramas that I have watched in a long time which owes both to the excellent script and the acting of the cast. Sarah Smart (Carol) and Joseph McFadden (Andrew) have such strong chemistry between them that you really believe in the intensity of heir relationship and are able to understand the motives for all of their actions. Beyond this, what really makes the story so is emotional is the supporting characters. Alun Armstrong plays Carols father with such sensitivity that although you know you should hate him as much as Carol does, you can't help feeling some of the pain he is going through.
On the other side Andrew's, parents add more depth to the story by their constant arguing and hate of each other yet their resilience to stay together both because of Andrew and because they do not know what to out outside of the marriage.
Sparkhouse emotionally illustrates differences between love and sex and shows that while some relationships are necessary for survival, others are so raw and uncontrolled that they can become a destructive power to all involved. There is a fine line between love and jealousy