Seems like probably a great finale for a tv show

but as a stand-alone movie, not so hot. Having not watched the show, I lacked the investment you're clearly meant to have in the characters and their relationships, and the movie doesn't do enough to build them. The production values and set pieces seemed like TV material as well.

There was potential for a good story but too much information in backstory the average viewer just doesn't have. The biggest question the movie raises is "Why should I care?" and the answer seems to lie elsewhere.

Having said that, as I mentioned I'm betting that for a fan of the show it was probably a great wrap-up. The scale was pretty epic given that it's obviously a sort of western-in-space that probably played out much smaller in regular episodes.

SPOILERS FOLLOW:

The only major complaint I have about the story is the turn-about of the Parliament agent at the end. He shouldn't have cared what the secret was. He cares about maintaining order and the status quo. He'd see the reason in hiding the truth about Miranda and would probably even advocate further efforts at an atmospheric additive to keep the populace sedate. He has a complete character reversal at a point when it would realistically be way too late for him to do so.

The theme is muddied by this and other things. The captain learns that he has to believe in something, like the agent does. Is the point that to defeat fanatics you have to become one? Isn't the agent proof that believing in something is dangerous?