Fitting End To The Original Series "Star Trek VI: The Undiscovered Country" had the difficult job of finally--finally--ending the adventures of the original crew of the Enterprise from The Original Series, in a way that doesn't leave its many fans disappointed. And overall, the movie succeeds well at this.
The plot is a VERY obvious allegory of the ending of the Cold War between the U.S. and Soviet Union.
*** WARNING: SPOILERS START HERE. ***
Praxis (Chernobyl), a key Klingon energy facility, is destroyed. The Klingon economy is badly hurt and its leader, Gorkon (Gorbachev), decides to make peace with the Federation. But a vocal minority of folks on both sides are unhappy with this, due to habit, distrust, suspicion, and outright prejudice.
Unknown assailants attempt to assassinate Gorkon. Kirk and McCoy are blamed by the Klingons, arrested, and exiled to Rura Penthe, a frozen, forbidding wasteland (Siberia). Kirk and McCoy must escape, figure out who is really behind the plot, and stop them before they finally succeed in murdering Gorkon.
This "whodunit," while darker in tone than previous Star Treks, is both engrossing and suspenseful. Each of the famous characters has a decent part in this movie as a fitting end to their playing these roles. The characters have grown more and are more multi-dimensional than they ever were in the past. Kirk is old now, and his years of battling the Klingons and losing his son have made him bitter and prejudiced toward them. Sulu shows he's capable of commanding a starship now.
Where the movie loses points, is in continuity with previous Star Trek. Star Trek always had to strike a balance between inventive new plots but still remaining faithful to the basic concepts and characterizations that had already been established--something Nicholas Meyer never cared much about. Showing treacherous Vulcans, Federation officers who are racially prejudiced toward Klingons, and Spock mind-melding a captive against her will (a kind of mental rape) were inconsistent with everything in previous Star Trek. Given that this was to be the last feature of The Original Series crew, this was not a great time to introduce such major departures.
Overall: 7/10