I wrote or helped write these episodes of “The Why Files.” I may have forgotten some or left them out by accident.

My favorite to research and write were “Gobekli Tepe,” followed closely by “Humans vs. Superhumans.” The episode that still shakes me to my core is the one on “The Tall Whites.” But, to be honest, the best episode was one I had nothing to do with: “Hollow Moon.” If you can come away from watching that episode as a nonbeliever, you are officially boring.