Lieutenant Marin Kim (Sal Landi) tells his story to a reporter of how he accompanied Captain Fetterman (Andrew Divoff) to an island 200 miles off the coast of the United States allegedly to clear the island of explosive ordinance, but once there with his team they uncover an extraterrestrial secret left forgotten for 50 years that has its sights set on revenge on humans.

While the in name only sequel to Xtro, Xtro II: The Second Encounter was a troubled production, the home video market at the time meant it was successful enough to warrant this third entry which according to director and producer Harry Bromley Davenport was a much more pleasant experience than Xtro II. Xtro 3: Watch the Skies is a superior effort to Xtro II, but not to the point where I'd call it passable or serviceable.

While Xtro II took inspiration from Alien/Aliens with its tight corridors, creature effects, and general character set, Xtro 3 takes inspiration from Predator with a jungle/island setting and an alien antagonist with cloaking abilities and mixes it with aesthetic and thematic similarities to the X-Files. The movie is way better made than Xtro II and also features more engaged characters including one character named Banta who, no joke, has a backstory inspired by Tonya Harding for some reason. The alien in Xtro while a very generic design is at least more dynamic and articulated than the xenomorph like creature from the predecessor. While being better than the bottom of the barrel Xtro II, it doesn't elevate itself to good as it's still padded with thin characters who don't have the chemistry or presence of its inspiration in Predator.

Xtro 3 is what it is, a below average direct-to-video film. It doesn't do anything wrong like its predecessor, but it doesn't do anything to distinguish itself from a crowded field either.

I like Sci-Fi movies and everything 'bout it and aliens, so i watched this flick. Nothing new, nothing special, average acting, typical H. B. Davenport' story, weak and cheesy FX's, bad ending of movie, but still the author idea is good. The marines on lost island find the truth about alien landing there and truth about past-experiments on them. They die one after one, some of them were killed by lonely alien, and others by human enemies. UFO effects, when it flees and crushes are bad,too. The voices of angry alien are funny,too. Reminds me on young monkeys. The movie is not scary, not very funny (maybe the old man, which marines find on the lost island, is the funniest freak in the movie. He's all confused and he dances all the time like old drunk). A little better sequel than XTRO 2: Second Encounter and 3-times weakest than the original movie. As I say "for the hardest fans only".

The first time I saw this film it really scared Me!The alien is very realistic and the scene where the scientist is operating on the alien's mate is disturbing but yet realistic.I don't want to go any more but I'll tell you this that if you like alien,sci-fi and horror films then check it out!