Re: TSFS Destruct Sequence: Why Chekov?
Sometimes I think people focus too much on continuity and not the overall themes a film wants to convey. The Enterprise, in Trek III, is seen as inseparable from its crew.
Holding onto the same codes from TOS, which the crew had committed to memory, even through reassignments, helped reinforce that. It's like, wherever Checkov goes, he will always remember the destruct codes of the Enterprise, almost like holding a locket with a picture of your loved-one in it. It's part of the sentimentality of it all, and that little pregnant pause where the ball passes to Checkov and he has to recall the code from memory is very effective.
I always saw Chekov' brief pause as being reluctance because he knew it was going to be the end of the Enterprise
"Everybody wants to rule the world..."