In 2267, Zahra accompanied Captain Kirk and his landing party to the surface of the planet Deneva to investigate the unusual communications blackout from the colony. The party discovered that the blackout was due to neural parasites infecting the colony. (TOS episode: "Operation -- Annihilate!"; TOS novel: Provenance of Shadows)
- In the novelization of "Operation -- Annihilate!" written by James Blish, Zahra's name is given as Zahara.