I like to think of Terra Prime as the 'real' Enterprise finale.
Good write-ups.

What's next,
The Cage?
Same here!
The Cage is coming, but I've to do a Season Four overview (which is this post), then the series overview, then one more artical before I post my review for
The Cage.
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Season Four Overview
Overall Season Rating: B+
Best Episode: Terra Prime
Best Episode Runner-Up: United
Worst Episode: Storm Front, Part One
I view season four in one of two ways. The first, it serves as a transition between the era it takes places in and the eras to come, solidifying its role as a prequel series. The second, as the last canon Trek to appear before Star Trek 11 and at a time when all Trek seemed hopeless, it kinda became a big fan-wanky exploration of Trek.
This worked for the best for season four, though I was hoping we’d see more of the exploration-type episodes that were more common in seasons one and two. A lot of the species we have seen in season four were those that we’ve seen before – the Andorians, the Klingons, the Romulans, the Vulcans, and even the augments. But that being said, this dove deeper with the Andorians and Vulcans that we’ve gone before and I love that.
The season kicked off with the end of the Temporal Cold War, but with no explanation about it. We never found out who Future Guy was nor was it ever explained why blowing up the temporal conduit ended the entire Temporal Cold War. It ended with disappointment and confusion.
After coming home, the crew took some time to recover before going out and tackling some Augments and stopping a possible war with the Klingons. This arc I found had similarities with the “Terra Prime” one in that they both forced the crew to take a look at their past and try and battle against it from erupting into the present and messing with the galactic future.
The Vulcan arc gave us Vulcans that we know and love and was great. With the except of the Klingon Augment arc and the three stand-alones, the Vulcan arc led into the Romulan arc, which in turn gave rise of the Terra Prime story. Remember the universe building I’ve been talking about? This was it. It showed us more of the Vulcans and Andorians that we’d ever seen, gave plenty of face time with the Tellarites, and showed us a peek of the future.
Character-wise, Archer’s overall storyarc came to an end here. I think by the time he went back out into space in “Borderland,” Archer had found a balance between peace and aggression. Having Surak in his head helped weed out of the rest of his paranoia and resentment towards Vulcans. Archer, as we leave him, is a different man than where he began.
Trip and T’Pol were way too on and off. They had so many talks that in the end, I don’t think that they knew where they were. The last scene in the season of them comforting each other is nice, though, and I really had some hope for them (though according to both “These Are The Voyages . . .” and “The Good That Men Do,” it was for naught).
Phlox had his small moments of characterization, but nothing much. Hoshi had some attention in “Observer Effect” and “Terra Prime.” Travis got nothing until “Demons” and “Terra Prime.” Reed had his conflict of interest in the Klingon Augment arc.
Overall, season four basically issues us forward, ending us far from where we started in season one.
***
Trek species:
Klingons: The Klingons, after nearly declaring war on Earth, were only mainly featured in their augment arc. The augment arc didn’t show us much of the Empire, though one can assume that due to the corruption mentioned in “Judgment” and the expanded use of subterfuge, they have taken yet another step down their path from honored warriors to corrupt soldiers.
Romulans: The Romulans, testing the water and ultimately trying to stop Andor, Earth, Vulcan, and Tellar from uniting, did a fine job of disrupting their peace. For a while . . . until all four worlds got their acts together. But the Romulans are out there and war will come.