Miners on a remote outpost are dying gruesomely to something moving through solid rock, and Kirk and Spock discover the culprit is no monster but an intelligent, silicon-based mother defending the last eggs of her species from unwitting slaughter.
Summary by Loreful, from public sources
Placement
- Star Trek Original TV Series Adaptations
- contained in Star Trek 4collection
- contained in The Classic Episodes 1collection
- contained in The Star Trek Reader IIomnibus