Should Alien Be Capitalized?

We capitalize names of alien races like Vulcan, Timelord, Cylon (well, maybe not alien), Krell, Nox, Minbari, and so on, but we never capitalize human.

Should you capitalize species names?

Historically, species names derived from proper names were capitalized, but modern practice is not to capitalize even those. Note that the genus and species (and subspecies and variety) are italicized. ... The names of the various levels of classification (like, class, order family, genus) are not capitalized.

Does character need to be capitalized?

Anyone first reading the script needs to know which characters are main or supporting roles within the script, differentiating them from characters that aren't specifically partial to the story. But these character names should only be capitalized once.