I lifted my caption from another review, done in 2015. That review contained info which might explain why everybody does not share my opinion that this was one of the very best segments of the X-Files.
It seems there was a good deal of extra story filmed, which had to be deleted. From the time I first saw it, 25 years ago, I wished there had been more detail about the seemingly perpetual connection between Scully and Mulder, as comrades in past lives.
I have no memory of ever seeing guest star Kristen Cloke in anything else, but she was excellent and very appealing. That element was not rare in the X-Files. There were many terrific guest performances over the years, but this segment always impressed me and when I dug it up to watch it again, all I could think is that it should have been made as a 2-part story. By doing that, it might have been more widely regarded as one of the best stories the series ever produced.
The X-Files was not, fundamentally, about aliens, monsters, Scully's baby or Mulder's sister. It was about a remarkable partnership, which always happened to involve fantastic cases.
I found the concept that these two FBI agents---who probably should be regarded as the most interesting police partrners TV has ever created---had been reincarnated as comrades through the ages, to be far more interesting than the common plots about saucers, black oil, black magic or mutants.
I must admit that the best ever may have been the one, from the same 4th season, about the origin of the cigarette smoking man. However, The Field Where I Died had the potential to be the next best and is worth going out of your way to watch.
JR.