Does anyone remember exactly what episode in the first season had the Fred Steiner arrangement of the opening and closing credits? The original DVDs put the Alexander Courage "electric violin" version on the first 13 episodes, but those volumes were originally released in production order. I'm pretty sure the themes didn't switch back after The Menagerie for two episodes, but my memory is not what it used to be.
The Blu-Rays don't help at all since the "original mono broadcast track" puts the Steiner version on EVERY episode except Where No Man Has Gone Before (which has a damned splice in it). Not to mention the one or two episodes that mistakenly have the new "TOS-R" version on the mono track. I'd love a Trek video release that is 100% accurate to the original airings one day. Ha!