This episode falls neatly into the well-established category of Star Trek episodes involving a mysterious disease that befalls the ship/crew, and there’s a race against time to cure it while everyone suffers whatever bizarre effects the disease causes. This time, the disease causes people to lose their ability to speak (and write) coherently or to comprehend others. At least, that’s the first symptom. Apparently the disease later leads to DEATH! Race against time!!!

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