It is easier for a civilized man to pose as a barbarian than it is for barbarians to pose as civilized men.
The Enterprise is safe from a murderous space probe as long as the probe continues to believe Kirk built it.
KIrk has to deal with Apollo, Greek God of Pushy Demands.
Star Trek ended its first season with an episode that promises a bit more than it delivers.
Dr. McCoy alters history, and the way to stop it will break Kirk’s heart.
Something is killing the miners on Janus VI. Kirk and Spock investigate.
Computers running war simulations are one thing. Following their orders is something else.
Star Trek often has common themes running through multiple episodes. One such theme is the society controlled by an outside force, often a computer.
How much can knowing the future hurt? Captain Kirk has to figure that out for an Air Force pilot stuck on the Enterprise.