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Gradually things get stranger and stranger. Worf returns from a bat'leth tournament to an Enterprise that's juuuust a few steps off from the one he left. "Parallels" is one of the few episodes that can qualify as "best" and also "most fun." It starts out with a common premise-someone comes back from shore leave and something is wrong!-but escalates from there. At least its understanding of biology is more advanced than the one where Barclay becomes a spider and Worf a de-evolved rabid wolf. That said, there's a thrilling mystery-adventure element to this episode of pseudoscientific gobbledygook that eventually adds up to an inconsistent but exciting whole. In other words, "The Chase" is an attempt to handwave a massive flaw in Star Trek and in wider science fiction.
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In reality, most astrobiologists find it unlikely that aliens will look much like anything on Earth, let alone like humans. On Star Trek, Klingons and Humans could have a child together despite arising several dozen light years away from each other. This is a cheeky attempt to explain one of the fundamental problems with making sci-fi movies and TV-that the aliens usually look humanoid since they must be portrayed by human actors. But -SPOILER ALERT-the object in question turns out to be a recording revealing that the humanoid races of the Star Trek universe were all intentionally seeded by an ancient humanoid species.
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The Cardassians, Klingons, Romulans, and Federation are all on the hunt for the same object, each trying to outsmart the next. "The Chase" is a love-it-or-hate-it episode.
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