1/2
Ugh. The end of the original series is near. This episode wasn’t just phoned in, it was phoned in on a disconnected line. There’s a cool special effects shot at least (see above) that makes for a creepy death scene. And the doomed library planet inspired the name for the Trek Wiki Memory Alpha. Other than that, not much to recommend here.
You didn’t mention that this was penned by none other than Sherri Lewis of puppet Lambchop and others fame. It was supposed to be a vehicle for her. She was to play that lead that got “memory-alphad” as it were by the bad aliens. Interesting only for that reason.