Movie Analysis: Species and Species II When you think of aliens and science fiction, you think of movies like The Predator and the Alien trilogy. But, if you throw in a former model instead of Sigourney Weaver, you will come up with Natasha Henstridge's 1995 movie, SPECIES. Since 1995 SPECIES has turned into SPECIES II, which as the name implies is the sequel. It also stars her. Both of them are in the Sci-Fi genre, as they involve outworldly elements, like space and aliens. Henstridge plays SIL, an alien created by humans. When a signal is sent out into spacealiens return it with information on how to combine their DNA. They try it,