Indeed there is, actually.
Gene Coon was only involved in the show until 3x06, Spock’s Brain. After that he was credited with writing 3x15, but he was no longer involved with the show.
Roddenberry was not the showrunner for season three at all, except for the final episode. (This was due to a bluff the studio called, which he had to follow through with.)
Also, many new writers and directors were brought in for season three that had not previously worked on the show.
What’s funny is how the episodes with neither of the Genes’ involvement are the ones with OOC behavior (which Nimoy himself has commented on), love interests with no ulterior motive, and less K/S screentime.
There are some exceptions here and there, but by and large the slash is gone when The Genes are gone, and it magically reappears in the last episode when Roddenberry comes back for the finale.
…I swear I remember answering this. o.O
But, yes! It’s called Gaywatch.
(I do feel a Commentary chapter coming on, yes.)
and because he’s also had plenty of coffee in him, I just realized that makes Eddie bisexual.
Like anchor like co-host.