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Now it's time for Star Trek. The very first one, with Kirk and Spock. I've reached the middle of the second season. The sets and special effects stopped bothering me around the middle of the first episode, and the characters' appearance – somewhere around the tenth episode. The length of the episodes was a bit annoying, although in terms of time, one episode of Star Trek is only slightly longer than one episode of Babylon-5 or Lexx (not counting the first season, of course). Now I'm already used to it. Of course, the series is not without its naivety and cliché plots, but that's not the worst flaw, and it's quite possible to come to terms with it. The characters are quite likable, and there are often interesting situations. The show is not without humor; it's genuinely very funny at times.
Overall, it's definitely for a specific audience, but I think the series is quite good, and you can definitely watch it and enjoy it. A classic, proven by time.