The X Species (2018) is a Mystery, Science Fiction, Thriller film that follows an archaeological expedition uncovers a prehistoric hominid burial site. When their team is unexpectedly attacked they are forced to take refuge in the catacombs of an unmapped cave. One by one they fall to an ancient predator. Currently, you can watch The X Species on Amazon Video. Streaming availability may vary by country and platform over time. Fans of mystery movies may also want to explore similar titles below.