STAR TREK: THE ORIGINAL SERIESS1, E7
What Are Little Girls Made Of?
Viewers are introduced to Nurse Christine Chapel in this story as she signs aboard the crew to search for her missing fiance, the brilliant Dr. Korby. He turns up on Exo III, oddly working on a plan to create android duplicates of key figures, beginning with James Kirk — until the captain sabotages his duplicate to alert Spock.
