When the Star Trek pilot aired for the first time, the role of the First Officer was played by a woman (Majel Barret). It appears that the Network Executives didn’t feel that the audience would consider it believable for a woman to play the role of commander so they recast it for a male actor.
But to clarify, the studio’s actual objection was to the actress herself (Barret)—not because she was a woman. The network wanted a strong female character but didn’t think the actress could pull it off.
As follows, the role of first officer went to Spock in the second pilot. The creator maintains that it was the most important change he created. Imagine how different Star Trek would be if this change wasn’t made!
Next: William Shatner never said that iconic phrase!