I enjoy Search for Spock, but you have to admit its plot makes no damned sense, and the more I watch it, the less sense it makes. The main characters seem to do things only because they've apparently read the script and know what they're supposed to do. They have no way of knowing that Spock's body is alive on Genesis, yet Sarek is demanding they go back there and pick him up? Kirk talks about saving Spock's immortal soul... but they already have that! It's in McCoy. So what the hell were they planning to do with the body in the first place? They obviously couldn't have been planning the refusion ceremony as T'Lar tells Sarek it's something only out of legend and presumably is only being able to be done here because Spock's body is, through fantastic circumstances, alive. Which, again, is something they didn't know to even be possible when they set out to the Genesis planet. So, again, why did they need Spock's body? Because he is alive and could receive the katra... which they have no way of knowing. So what is it they were trying to do in the first place? I'm so confused!
Then, of course, there's the triumphant scene of Kirk going against orders, sacrificing his own career to go and get Spock... for nonsensical reasons... but it's still pretty cool to watch. Except for the fact that there was absolutely no need for him to do that either! "Gee, I need Spock's body... for some reason. But the commander told me that no one but the science team is allowed to go to Genesis. Hmm. It's that same science team my son and former cadet are on. Maybe I should just call them up and ask them to pick up Spock's body for me? Nah, fuck that. I'll just steal the Enterprise and jeopardize the careers of my fellow officers just because! Hopefully I'll arrive just in time to intervene in an interstellar crisis that I have no idea is about to occur!" It's like everything in this movie happens precisely to anticipate the next big thing that the characters should have no way of anticipating. They really were writing this script starting from the end and working their way to beginning, and it shows.