This was a woefully bad piece of TV - the thrust of which promised to look at aliens from other planets. However, the programme took itself down an entirely different route by presenting examples of cryptozoology instead.
So we had a south american big-headed starchild, another tiny thing which looked like a shaved monkey and the Montauk drowned and decomposing raccoons.
While all manner of scientific testing was used to get to the bottom of these monsterous mysteries, the show failed to address just how a space raccoon could pilot a starship or how intelligent the tiny shaved monkey would have been and how it managed to cross the galaxy only to get stuck in a rat trap.
In the end, it didn't matter because they were all explained away but their champions had all believed that they'd come from another planet without really thinking about homegrown mutations.
I believe it's on 4OD but I wouldn't bother if I were you.