Species is a 1995 science fiction horror film directed by Roger Donaldson, and starring Ben Kingsley, Michael Madsen, Alfred Molina, Forest Whitaker, Marg Helgenberger, and Natasha Henstridge. The film is about a group of scientists who try to track down and trap a killer alien seductress before she successfully mates with a human male. The film produced one theatrical sequel in 1998, Species II, which had Henstridge, Madsen, and Helgenberger reprise their roles. It was followed by the direct-to-video Species III in 2004 and Species: The Awakening in 2007, which stands as a separate film, not as an official follow-up to the previous three.
Earth's scientists sent out transmissions with information about Earth and its inhabitants, DNA structure, etc., in hopes of finding life beyond Earth. They then receive transmissions from an alien source on how to create endless fuel effortlessly. Therefore, the scientists assume that this is a friendly alien species. But from a second alien transmission, the scientists receive information about an alien DNA along with instructions on how to splice it with human DNA. A government team led by Xavier Fitch (Ben Kingsley) goes forward with the genetic experiment hoping to induce a female with "more docile and controllable" traits. The alien is the result of the SETI (Search for Extra Terrestrial Intelligence) program. One of the hundred experimental ova produces a girl named Sil, who looks like a normal human but develops into a 12-year old in 3 months. Sil's violent outbursts during sleep make the scientists consider her a threat. They try to kill her using cyanide gas but instead she breaks out of her containment cell and escapes. The government assembles a team composed of anthropologist Dr. Stephen Arden (Alfred Molina), molecular biologist Dr. Laura Baker (Marg Helgenberger), empath Dan Smithson (Forest Whitaker) and mercenary Preston "Press" Lennox (Michael Madsen) to track and destroy Sil. Sil matures rapidly into an adult (Natasha Henstridge) in her early twenties and makes her way to Los Angeles. This makes tracking her extremely difficult. She is incredibly strong and intelligent with amazing regenerative powers. The scientists fear she may mate with human males and produce offspring that could eliminate the human race. Sil lacks inhibitions when it comes to killing people who get in her way and wants to produce offspring as soon as possible. She frequently morphs into her alien form, a bipedal creature with tentacles on her shoulders and back. Sil tries first to mate with a man she meets at a night club, but after sensing that he is diabetic, rejects and kills him by puncturing his skull with her tongue. She then tries to mate with a man she meets after a car accident. They swim in the man's pool where Sil forces the man to open his swimming trunks in order to mate, but the man refuses. This is interrupted by Press and Laura. She kills the man and flees naked into a forest without being seen by the team. She pretends to be a rape victim, and then proceeds to kidnap a woman. She fakes her death by crashing the woman's car into a tree during a high-speed chase. After cutting and dyeing her hair, she takes an attraction to Press and attempts to seduce him. She eventually copulates with Arden; then kills him when he realizes who she is and what he has done. The rest of the team then follow her into the sewers where Fitch is subsequently killed and the area where she and her offspring are destroyed. Press uses a grenade launcher on Sil, blowing her head off. The trio leaves the area. The last scene shows a rat chewing on one of Sil's severed tentacles; it starts to mutate into a vicious beast and attacks another rat.