[troutman]

Finished watching last night.

I don't know how to hide spoilers,

Spoiler!

but I have a theory about the monster.

Spoiler!

There were some hints that the monster is an alien in the classic sense - from another planet or star system. The scientists talked about making "contact". Also, one of the final scenes was a long shot of a very starry sky.

More likely, the monster is a being from another plane of existence, not another star. D&D mythology is full of alternate planes and dimensions - like the Shadow Plane. The monster does not seem intelligent or capable of space travel. How can it move between worlds? Why was there only one?