“Useless Humans” (* out of four) was a useless sci/fi comedy about four none-too-bright friends (Josh Zuckerman, Rushi Kota, Davida Williams, and Luke Youngblood) celebrating a thirtieth birthday when a mysterious creature (James Croak) crashes the party and (yawn) the fate of the world and mankind is hanging in the balance. Irritatingly stupid characters and writing make this a chore to sit through. Cast attempts to enliven the terrible script by overacting as much as possible but it’s like squeezing blood from a stone.