The first half of the episode is not as good, but the last half, showing the four remaining Enterprise crewmen trying to overload the Kelvans' emotions is one of the most entertaining episodes. Good performances by Stevens, Bouchet, and Fortier in particular.
But unless Kelvan biology is totally different from any other living organism I've ever heard of, it's a lunatic idea to think that you can run a multigeneration ship on a 300-year voyage with five Kelvans and four humans. How are they going to produce several new generations of Kelvans? Even if the Kelvans can interbreed with the humans, there isn't enough genetic diversity with nine people, and the descendants who reach Andromeda will be biologically inferior, possibly even feebleminded.
But unless Kelvan biology is totally different from any other living organism I've ever heard of, it's a lunatic idea to think that you can run a multigeneration ship on a 300-year voyage with five Kelvans and four humans. How are they going to produce several new generations of Kelvans? Even if the Kelvans can interbreed with the humans, there isn't enough genetic diversity with nine people, and the descendants who reach Andromeda will be biologically inferior, possibly even feebleminded.