Amusing in parts, learned certainly with Shakespearean quotations and themes and watchable.
The best part though is that this version has the FULL film shown, particularly the last couple of scenes at the conference where the Klingon sniper is shown to be a human in disguise, thus showing that it was a Romulan/Klingon/Federation complete conspiracy. Without this scene, which is always missed out on TV showings, the storyline was incomplete.
The last of the 'original' crew films (although they did make an appearance in Star Trek: Generations in 1994) and one of the best of the series. After the shambles of the previous film this was a welcome return to a gritty, well told and intriguing story that is a clear allegory to the collapse of the USSR. This has a darker, violent edge to it from the moment the film starts, even the music is ominous and then a spectacular exploding planet begins the film. The Klingons, the old adversary throughout the films, are forced to seek peace terms with the Federation and Kirk (William Shatner), well known for despising them, is ordered to escort the Klingon Ambassador (David Warner) to Earth for the peace talks. But then the Ambassador is assassinated, Kirk and McCoy (DeForest Kelley) are convicted of his murder and imprisoned on a penal planet. Spock (Leonard Nimoy) and the crew of the USS Enterprise have to come along to the rescue. The film has some really violent scenes with bloodshed, people frozen to death and a harrowing interrogation scene so it is a return to serious story telling for the franchise. There's jokes about the ages of the crew and talks of their retirement but plot wise this has political conspiracy, racism and bigotry to root it in contemporary issues. It's a very worthy addition to the series and a very good science fiction story. To top it all additional cast including Warner, Kim Cattrall and the great Christopher Plummer as a Klingon General who loves to quote Shakespeare make it entertaining and bloody marvellous.