Spock is a bit too emotional, and more people beam down in one trip than there is space for but other than that this is a pretty solid episode. This is (to my knowledge) star treks first look at altered history or of WWII and they pull it off fabulously. Storyline is as follows: McCoy is shot with something that makes him mad (as in insane) and jumps though what turns out to be a living time machine. Of course he alters history so kirk and spock go back to the approximate date of his arrival to fix things. They arrive early, befriend Edith Keeler, who shares many of their ideals, and kirk falls in love with her. Spock meanwhile is trying to find out what McCoy changed and how to fix it. The first glimpse he gets shows that Edith is involved (and the possibility of her death) but not how. At this time neither kirk nor spock know what caused the change; they only know they need to prevent it. By the time the figure it out, Kirk doesn't think he can go through with it.
The episode is especially good because here McCoy has some very good dialog (funny and serious and some that is both) not involving spock! And although spock seems more emotional, he is as logical and dispassionate as ever. kirk on the other hand has quite the battle for values. Most of the drawback comes simply from this being an early episode. They still have some flaws to shake out. But it's all good. 4 out of 5 stars and you can skip the Guardians dialog in my opinion.
The episode is especially good because here McCoy has some very good dialog (funny and serious and some that is both) not involving spock! And although spock seems more emotional, he is as logical and dispassionate as ever. kirk on the other hand has quite the battle for values. Most of the drawback comes simply from this being an early episode. They still have some flaws to shake out. But it's all good. 4 out of 5 stars and you can skip the Guardians dialog in my opinion.