visit the aliens homeworld,see their life story
That would be worth a watch, but would the Aliens have much of a home planet?
Aliens don't (as far as I know) have any technology, they don't build houses or farm animals, so on thier home world they would dominate through killing and breeding, but without a constantly refreshed supply of hosts they would soon die out, wouldn't they?
In fact the Aliens would not have been able to get off planet without the help of some other species. Hmmm, there is a good possibility here, they could start by using something less intelligent as a host, but then get picked up by some space faring alien and use them as hosts, and cross the galalxy. Or they could be at war on their home planet with a host(able) species that they never quite wipe out, but when the host(able) species flees the planet they hitch a ride and plague the galaxy.
What is the back story for the Aliens? Anyone know?