In search of exobiologist Dr. Roger Kirby, Nurse Chapel's ex-fiancee, the Enterprise finds that he has constructed androids and given himself an android body in a plan to replace key Federation leaders with android duplicates.
Air Date: 10/20/66
Director: James Goldstone
I love this episode. What's not to like? Hot android girl, ego-maniacal villain, giant evil robot, kirk holding a big stone phallus? It has it all!