C: 3.5 stars - There were three really interesting ideas, two of which were reasonably unique, and none were developed because the key conceit of the episode was so stupid. They did actually develop some suspense towards the end (before the surgery) which I found unusual for TOS. I would have liked them to have kidnapped Spock and wired him in as the Controller, so we could explore the idea of a matriarchal society, a society which has lost knowledge due to un-use, and the logic conversation of 'this is killing, and you want to avoid killing', to avoid force as a solution. That said, Scotty's faint/feint was well executed. Incredibly Kirk didn't try to seduce anybody, and the red shirts got to live.
Is this Star Trek? Very. It's in space, they travel around, using their communicators and phasors, and there is something of an ethical problem - sadly poorly executed though.
Plot Summary: Aliens steal Spock's brain, so Spock's body and the rest of the crew have to get it back.
Index of TOS Reviews