It is natural that Australia, having lengthy (dependent) ties with the UK, aspires to imitate/repeat the latter's success in the field of crime thrillers, stocking it with local nature and habits, sometimes without having any influence to the course of events or effect on scenes. A lot of is also visible in Deep Water where tautness and smoothness are overshadowed by personal issues with references to the past and leisure activities on the beach.
Well, the beginning is intriguing, but the motives and many suspects are revealed too soon, the characters are somewhat arid, the police has seemingly no ranking order in place, and the background of the principal wrongdoer is too trivial and vague for the offences he committed. So the 4 episodes a' 50 minutes are too long and hectic; moreover, I was not pleased with the final events and events leading up to them. In the wide world of English-speaking crime drama series, Deep Water is hardly the one to be classified as "must-watch".