DeForest Kelley and DC Fontana had a great character idea for Dr. McCoy. Instead, we somehow got Chekov’s girlfriend from The Way to Eden.
The Inside Star Trek newsletter is an invaluable source for Star Trek’s early voices. Issue 1 detailed William Shatner’s busy schedule, told us about searching through studio garbage and shared a made-up story about the Vulcan IDIC medallion.
I own the Amok Time story outline Ted Sturgeon submitted to Gene Roddenberry. It’s a fascinating look at the process of creating an episode and at the Trek that could have been.