The Undiscovered Country - Star Trek 6:

During the escort, Gorkon is murdered by assassins appearing to be Federation officers. Kirk and Dr. McCoy are framed for the crime, subjected to a Klingon "show trial," and sentenced to the frozen gulag Rura Penthe .

Spock leads an investigation on the Enterprise and discovers a cross-species cabal involving Federation, Klingon, and Romulan officials—all of whom fear their "usefulness" will end in a world of peace. Star Trek 6: The Undiscovered Country

After escaping Rura Penthe, Kirk and the crew thwart a second assassination attempt on the Federation President at the Khitomer peace summit, officially ending decades of hostility. 2. Real-World Allegories During the escort, Gorkon is murdered by assassins

The film is noted for its heavy use of late-20th-century political metaphors: Spock leads an investigation on the Enterprise and

Captain James T. Kirk and the USS Enterprise are reluctantly assigned to escort Klingon Chancellor Gorkon to Earth for peace negotiations.