Species II is a 1998 American science fiction horror thriller film directed by Peter Medak. The film is a sequel to Species (1995) and the second installment of the Species film series. The film stars Michael Madsen, Natasha Henstridge, Marg Helgenberger, Mykelti Williamson, George Dzundza, James Cromwell and Justin Lazard. In addition to Madsen and Helgenberger reprising their roles, Henstridge also returned for the sequel as a new character. The plot has Patrick Ross, the astronaut son of a senator, being infected by an extraterrestrial organism during a mission to Mars and causing the deaths of many women upon his return. To stop him, the scientists who created the human-extraterrestrial hybrid Sil in the original Species try using a more docile clone of hers, Eve.

Plot

While participating in a human mission to Mars, astronauts led by Commander Patrick Ross, Anne Sampas, and Dennis Gamble collect soil samples. While returning to Earth, the soil thaws and releases an alien substance that contaminates them and causes a brief contact gap with mission control. The trio return to Earth to public celebration, but an institutionalized former scientist, Dr. Cromwell, reacts to their return with violent panic. They are examined and quarantined to prevent them from engaging in sexual activity for ten days. However, Ross ignores this and has sex with two women. To his horror, the pair undergo accelerated pregnancies and die giving birth to human/alien hybrids, which he hides in his father's remote shed.