I am so very sorry that I did not read the warnings from the reviewers of this last episode. I should never have watched it, and I really regret I did. After a hesitating start, a fantastic third season and a very good fourth, this finale is bad, it's an evil, stupid pile of wasted opportunities. Star trek writers and producers like to show off with their knowledge and respect for 'the legacy'... well, this is where they killed it. (Read the other reviews for details)
Seriously : be warned. Don't watch!