In the series premiere, the Enterprise visits planet M-113 where scientists Dr. Crater and his wife Nancy, an old girlfriend of Dr. McCoy, are studying the remains of an ancient civilization. When Enterprise crewmen begin turning up dead under mysterious circumstances, Kirk and Spock must unravel the clues to discover how, why, and who is responsible. Written by
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James Doohan does not appear in this episode, but he is briefly heard on Kirk's communicator in dialogue lifted from another episode. See more
The "vampire" has lived without salt for a year, yet once prey shows up, it seems to desperately need salt every few minutes. However, it could be stocking up on salt supplies within its body just as a camel stocks up on water, or as humans and many animals store calcium and other rarer minerals into bone tissue. See more
Captain James T. Kirk
Captain's log, stardate 1513.1. Our position, orbiting planet M-113. On board the Enterprise, Mr. Spock, temporarily in command. On the planet, the ruins of an ancient and long-dead civilization. Ship's surgeon McCoy and myself are now beaming down to the planet's surface. Our mission: routine medical examination of archeologist Robert Crater and his wife Nancy. Routine but for the fact that Nancy Crater is that one woman in Dr. McCoy's past.