To save his ship, Kirk intervenes in a 500-year-old, computerized war between neighboring worlds; guest Barbara Babcock.
A search for the long-missing spaceship Archon leads the Enterprise to a world dominated by the god Landru.
Capt. Kirk faces an agonizing choice when he and Spock follow McCoy to 1930s New York to restore history's altered course. A Hugo Award winner.
Spock faces a test of leadership when an ion storm strands him and a shuttlecraft crew on a hostile world.
The Enterprise finds a band of orphaned children living alone on a desolate, Earthlike world; guests Kim Darby, Michael J. Pollard.