“Catspaw”
“Catspaw” Two alien beings with apparently superior power hold the Enterprise hostage and create a castle of horrors to scare the human crew members. When their matter transmuter is destroyed, they turn out to be two tiny creatures not able to survive in the planet’s atmosphere. summary by Ex-Astris-Scientia
Well, it’s really hard to tell exactly what I feel like about this one. On the one hand, the idea of superior beings testing the human race is something that really appeals to me. Then again, it’s been done to death in Star Trek. Perhaps the ending, when it turns out the all-powerfull lady and her friend are nothing more than a couple of bugs (or was it birds?) , helpless in the outised world… Yes, I think I liked it most here.