This episode about the mysterious doppelganger, took some research. I couldn't have done it alone, so here are this episode's sources of knowledge; www.gods-and-monsters.com/list-of-mythical-creatures.html https://www.merriam-webster.com/dictionary/doppelgangerhttps://www.atlasobscura.com/articles/history-doppelgangerhttps://www.britannica.com/art/doppelgangerhttps://www.ancient-origins.net/myths-legends/doppelgangers-and-mythology-spirit-doubles-001825https://listverse.com/2013/08/30/10-disturbing-tales-of-doppelgangers/https://sasquatchchronicles.com/doppelgangers-and-the-strange-case-of-emilie-sagee/https://en.m.wikipedia.org/wiki/Jean_Paulhttps://www.thoughtco.com/true-stories-of-doppelgangers-2593448