Lee Thomson has a copy of Gene Roddenberry's March 1964 pitch for Star Trek. There were many changes made before the first and second pilot episodes were filmed. The ship's doctor, for example, went by a different name, but was still known as "Bones". Sex kitten Yeoman Rand was called "Colt", and Roddenberry clearly had a larger role in mind for that character.

Link via Geekosystem