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The creativity behind Star Trek was not without its struggles. Notably, famous author Harlan Ellison crafted the iconic episode "City on the Edge of Forever," only to find that Roddenberry significantly altered his script, leading Ellison to request his name be removed from the credits. This conflict illustrated the tumultuous relationship between writers and producers in the realm of science fiction television.
The series also underwent various cast changes and decisions, as the character of Spock was ultimately favored over the original female lead. The decision to keep Spock, portrayed by Nimoy, was based on his potential for depth and complexity, which significantly contributed to the character's iconic status.