When Kirk, Spock and McCoy beam down to a supposed uninhabited planet to gather the mineral ryetalyn to fight a plague of Rigelian fever on-board the Enterprise, they find a fellow Earth-man called Flint and his extremely intelligent female ward Rayna with whom Kirk begins to fall in love. Flint then proceeds to trap them and the Enterprise on his planet. Written by
Did You Know?
The TOS Season 3 DVD release incorrectly spells Rayna's name "Reena" in the end credits. Her name is shown in the episode very clearly as "Rayna" during the reveal of the multiple versions of the android. The correct spelling could be seen in the end credits on the earlier LaserDisc and VHS releases, and was later restored for the TOS-R Season 3 DVD collection. See more
Right after beaming down to the planet, when McCoy tells Kirk that what they need is 4 km away and that they have very little time to get to it, Kirk begins walking. If they're really in a hurry (and even if they aren't), he would have Scotty transport them back to the ship and then to where they need to go. See more
Captain's log, stardate 5843.7. The Enterprise is in the grip of a raging epidemic. Three crewmen have died and twenty-three others have been struck down by Rigelian fever. In order to combat the illness, Dr. McCoy needs large quantities of ryetalyn, which is the only known antidote for the fever. Our sensors have picked up sufficient quantities of pure ryetalyn on a small planet in the Omega system. We are beaming down to secure this urgently needed material.
References This Island Earth