“The Doomsday Machine” *****
A Starfleet Commodore driven by guilt tries to destroy a planet killing robot.

And another 5 rated episode. Really, though, this is one of
Star Trek's finest hours and space adventure done well. William Windom does a wonderful job of portraying a ship's captain obsessed with guilt over the loss of his crew. And they can reimagine it all they want, but I still love the original rough hewn alien look of the planet killer (and, yes, I know that's not how Norman Spinrad initially envisioned it).
One of the things that gets me about this story is its epic feel. For me this has more drama and high adventure to it then all manner of sci-fi flicks with ever bigger explosions, loud f/x and lens flares aplenty, probably because it's well written, well edited and sports some damn good performances. This is the kind of SF adventure story I'd like to see on the big screen. The closest thing I've seen feature film wise (in terms of overall feel) are
Master And Commander and perhaps
The Wrath Of Khan.
It doesn't get much better than this.
Now in fairness it's easy to see where a little more time and thought could have gone into the original f/x sequences. The
Constellation model, while nicely damaged, really looks like it was hastily thrown together---at least a better paint job was called for. And there are even some shots of the 11ft. miniature that don't work very well. And the shuttlecraft miniature is
waay out of scale with the planet killer. There is another logic hole: a planet is a
very big object and even one planet would be able to supply
a lot of matter for a device of the planet killer's size. Yes, it was big in relation to a starship, but in relation to a planet it would be awfully small.
There are also some other questions. Spock's conclusion/assumption that the robot originated from outside the galaxy only works if the course they project enters the galaxy from above or below the galactic plane. Otherwise it could have come from anywhere. And it doesn't follow that this thing could necessarily have been all that old---it could have been built within decades to centuries and not necessarily thousands of years or so.
But somehow the rest of the story and execution overcomes what are really minor shortcomings.
We also get our first look at Kirk's new alternate green command tunic. Nice, but I kinda like the first season version a bit better.