Don Wildman investigates the mysterious bacteria that imperiled the NASA space program, the decrepit remains of a mythical beast and a hidden insect that painted the world in a whole new color.
This episode should slot in between eps s21e15 & s21e16 on your website, but is numbered as s21e9 on Travel Channel's website: https://www.travelchannel.com/shows/mysteries-at-the-museum/episodes/killer-space-germs-the-yetis-hand-and-the-bug-that-changed-history.
I've labeled as special because I don't want to further destroy the numbering of season 21's screwed up numbering.