Mysterious deaths of Enterprise crew on a desolate planet disrupt McCoy's unexpected reunion with an old love.
A strange ailment which bares emotions afflicts the crew as the Enterprise observes a planet's disintegration.
The Enterprise discovers a remote world bearing an unlikely resemblance to 1920s Chicago; guest Vic Tayback.
Shore leave on an idyllic world goes awry when Enterprise crew members find the fruits of their imaginations coming to life.
To save his ship, Kirk intervenes in a 500-year-old, computerized war between neighboring worlds; guest Barbara Babcock.