After watching this episode several times I have come to the conclusion that this should have been the series finale. It was an absorbing trip backward in time, to the different aspects of various civilizations and the various stages of evolution---such as Vulcan in primitive times, the time of so-called witchcraft and how Kirk coped with it, the trials of poor Zarabeth and how she almost escaped...and how Kirk and Co. escaped back into the 23rd century just barely in time before the sun went supernova. I enjoyed this one and have always felt that it should have been the fitting conclusion to a superb series.
Review of All Our Yesterdays
