 The first sequel to Species , Species II was released theatrically in April 1998 . The film depicts astronauts on a mission to Mars being attacked by the aliens from Species , and the events that ensue upon their return to Earth . There , Dr. Baker has been working on Eve , a more docile clone of Sil . Madsen and Helgenberger reprised their roles , while Henstridge played Eve . Species II was received by critics worse than the first film , <unk> a 9 % approval rating at Rotten Tomatoes , and Madsen denounced it as a terrible film . The film 's director , Peter <unk> , attributed the failure of the film to not picking up the infected rat ending of the original film . Navarro later authored the novelization for Species II which followed the film 's original screenplay with added scenes . 
