The feminist Star Trek that almost was
Center of Gravitas: Boldly Going Where We Have Been Before

When Gene Roddenberry first filmed a pilot for the show, he did have a revolutionary idea for 1967: The second in command of the Enterprise would be a woman (known only as “Number One”). This first version of the show had Captain Christopher Pike commanding the famed ship along with the "logical" Number One as First Officer. That first episode showed Number One making life and death decisions and playing with really big guns. Alas, the network executives didn’t like the notion that an uppity woman would take over command of the ship whenever Captain Pike was in peril (They were even less pleased that Roddenberry was having an affair with Majel Barett, the actor who played “Number One”).
Thus, after a complete rewrite, Roddenberry’s ambitions for women on the show had been significantly altered. Kirk appeared as Captain and women were demoted to “more traditional roles,” such as yeomen or nurses. Instead of taking over command and making decisions for the crew, women on-board the Enterprise took the Captain’s messages and made him coffee. Majel Barett, no longer First Officer, assumed a role as Nurse Chapel who spent her days mooning over Spock and handing out aspirin.