20 Things You Didn't Know About Star Trek V: The Final Frontier
8. Sorry Jim, You're Stuck With Us
William Shatner had story approval on Star Trek V, which gave him the power to change what he needed, where he saw fit. That meant absolutely nothing however when Leonard Nimoy and Deforest Kelley flat-out refused a story change that Shatner sought to make. In his treatment, both Spock and McCoy would join Sybok, leaving Kirk alone.
Nimoy was the first to speak up. He said that, after everything the two characters had been through together, including Kirk sacrificing his commission, his ship, and even his son, to save Spock, there would never be a chance that Spock could betray him. It was too far out of character to work, and Nimoy stuck to his guns. Kelley followed suit, arguing that there was no way McCoy would turn against both of his oldest friends.
Shatner was forced to concede the point that they were probably right, reflecting years later that if someone had unilaterally decided on a seismic change of Kirk's character, without consulting him, he was likely to hit the roof as well.
For its flaws, Star Trek V contains some of the best scenes of friendship between the main trio - somewhat ironic, considering the turn it could have taken.