The science fiction genre has provided moviegoers with some of the most ambitious, outlandish and thought-provoking material in cinematic history. A reliable source of thrills (and kills), the level of adventure that these type of films offer has allowed cinema to make incredible leaps in multiple departments - including story and special effects.
Unfortunately, being revolutionary can come at a cost, as the popularity of these ambitious offerings often results in studios going to the well again (and again and again and again and again). And as any sane person would know, going to there one too many times can sap even the most creative of wells, taking the fun and awe out of a story that was once truly great.
Yes, Hollywood's incessant desire to franchise everything is still capable of producing some real gems, but more often than not, it results in a truly outstanding film or two being followed by a host of uninspired sequels that threaten to taint the original's reputation - something that is particularly prevalent in the sci-fi genre.
With that in mind, let's take a look at some of the sci-fi sequels that failed be more than a major letdown.
10. Terminator 3: Rise Of The Machines
Is Terminator 3: Rise of The Machines the worst of the Terminator franchise? Hell no! The film is a thoroughly enjoyable thrill-ride with a solid antagonist in the T-X, ridiculously ambitious set-pieces and some of Arnie's best one-liners, and it's certainly cut above the majority of sequels that followed it. In 2003, however, that just wasn't enough.
For many a years, it filled the role of 'lacklustre Terminator sequel' simply because, in spite of how much fun it was, it somewhat missed the point of the franchise's story, remained too light on the character development front and ultimately failed to live up the standard set by both of its incredible predecessors.
Sure, it didn’t help that we didn't have an abundance of poorer sequels to compare it to back then (which now highlights how decent it actually was), but that doesn't change the fact that the Terminator franchise's decline started with T3. It's just a shame it didn't end there as well.