It's a script, Jim but not as we...
Ok, we have a scientist trying to open a portal which he then does by accident. He captures an alien and then his alien friends come looking for him. Scientist gets abducted through the portal to an alien world where he meets a native who explains that the aliens are invaders on her mineral rich planet. Meantime, the military who fund scientist's project sends two soldiers after him.
As a plot goes, it's okay and could be "worked up" a bit more to be more interesting/new. For example, what if the scientist has some knowledge that would save Earth but he's been abducted and the only way to save Earth is to get him back (fast!) - see it creates a bit more "story". This kind of extra motivation/plot stuff needs to happen for each of the characters including the invaders (they need the minerals to stop a deadly plague on their own planet) etc etc.
The dialogue is also too expository and on the nose. For example, the way the "interpretation pill" works is explained twice. Why does it need explaining - just have him take the pill and gradually the alien-tongue becomes understandable = show don't tell. We have the soldiers say things like "We need to find Dr X" (which is why they've been sent there!) and "Look, footprints. I think it's this way" (it's not as bad as this but almost, in places).
Sorry for the harsh comments but just trying to help.
SB
