A taut and topical political thriller that, unfortunately, goes off the rails.

In its defense, the basic premise is plausible, the writing is tense and dramatic, and the acting and direction are professional. Other posters have complained about implausibilities in the plot, and the wrong names used for things. A political thriller must have some unexpected twists or there would be no story, and we can assume that the "H2O" world has different names for things like the RCMP and War Measures Act.

The series, however, goes off the rails in the third hour. We can accept one or two extremely implausible events if the story requires it, but when near-impossible events happen again and again, with a new one each few minutes, credibility crumbles. Worse, earlier crises are left unresolved before the next one hits.

I'll give an example. An assassin is killing anyone, no matter how powerful or insignificant, who threatens the conspiracy. One of the major characters is a police detective who is about to unravel the plot. The assassin traps her, spills clues about the conspiracy, and then lets her go. This is an absurd Hollywoodism, like something from an old Flash Gordon serial. There are even bigger howlers in the series, and I know what happens later, but this is the one that made me want to throw something at the TV.

The series plays like it was written by a committee, and each member wanted to get their plot twist in whether it made sense or not. The ending is a disappointment too; there is yet another plot twist in the last few minutes and the story just stops. All the viewer is left with is a huge number of unresolved plot twists.