Title: Yesterday's Son
Description: The Romulans attack the planet Gateway, where Federation scientists are studying the Guardian of Forever - the mysterious portal to the past.

The Enterprise must protect the Guardian - or destroy it. But Spock has already used the portal to journey to the past. On the planet Sarpeidon, 5000 years ago, Spock knew a beautiful, primitive woman. Now he has gone to meet his son!
Subjects: Star Trek fiction, Fiction, Space ships, Interplanetary voyages, Science fiction, Science-fiction, collectionID:ST#, Kirk, james t. (fictitious character), fiction, Mccoy, leonard (fictitious character), fiction, Spock (fictitious character), fiction, Fiction, media tie-in, Fiction, science fiction, space opera