There’s a big plot here, of course…near destruction, so on.
But the real attraction is Spock and his parents: their interactions, and the interactions of others with/around them.
Highlights:
Sarek
emphasis on Spock
a teddy bear!
opposition to survival odds estimation
Spock vs. his mother (truly dramatic)
interesting background on Spock
great ending
Lowlights:
Kirk’s HAIKIBA! kick and sloowwwww recovery
Kirk’s episode summation
sadly-easy combat resolution
Spockism: “Humans smile with so little provocation.”