The Alien Train is a strange construct that appears early on in one of Sil's nightmares, where it chases her.
- The Ghost Train idea has been with H.R. Giger since his childhood. He tried incorporating it into film projects, such as the Alejandro Jodorowsky version of DUNE and Ridley Scott's THE TRAIN. He finally got the chance to add it into the Species, although not in the length he wanted.