Alien spores makes the crew want to just abandon what they were doing and start a farm.
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.
The Enterprise meets another godlike being, and this one likes to play games more than most.
Kirk and McCoy find terror on a planet that appears to conjure whatever you think about.
Harry Mudd appears for the first time, and we get more outdated gender politics.
The transporter splits Kirk into two people: one good and one hammy.
Is this the most infamous episode of the original series?
Pilot for Star Trek, take two!
Star Trek comes on the air with a salt vampire.