Kirk appears to be missing, forcing Spock and McCoy to work together to get out of a series of interconnected problems.
All-out war breaks out on the Enterprise between the crew and some Klingon prisoners.
Kirk, Spock, McCoy, Scotty, and Chekov find themselves in the OK Corral. Sort of.
Well, someone stole Spock’s brain.
A computer running the Enterprise may lead to a lot of dead people.
Captain Kirk teaches a valuable lesson to some nascent Americans.
Kirk, Uhura, and Chekov find themselves forced into the role of gladiators!
Tribbles eat, reproduce, and cause all kinds of trouble.
Most of an away team find themselves rapidly aging at the worst possible moment.
Harry Mudd causes more problems for Captain Kirk, this time with a planet full of androids.