Good evening Stuart,
I'm sorry to hear that Scott Burgess from Water Rats is going through marital problems, but to the same extent it doesn't really bother me, just like almost every other "celebrity" story. I do hope that his problems are sorted out quickly.
To answer your question, the show ended on the seventh of August 2001. It was a great Australian drama and I was sorry to see it go, but it was also good that the producers were informed that Channel Nine wouldn't be renewing the program and they therefore had a chance to write a good conclusion. The show ran for six years.
Channel Nine have been repeating the show in the wee hours of the morning in recent years, and I believe that it will be on at some stage tomorrow morning. I try to watch it when Nine repeat it, and I'm slowly building up a collection of the DVDs of the series.
I also noticed that a couple weeks ago the New South Wales police named their newest boat the "Nemesis", which just happens to be the name of the main police boat on Water Rats. All they need now is a "Harpie" and a car named "Water Police 200" and they'll have the full set!