Episode 2. Shapeshifters:

https://mythology.net/mythical-creatures/shapeshifter/

https://www.ancient-origins.net/myths-legends-asia/kitsune-0012027

https://en.wikipedia.org/wiki/Berserker

http://bestofalltopics.com/history-of-shape-shifting-legends-and-folklore/

https://wicca.com/animal-guides/shapeshifting.html

https://www.greekmythology.com/Myths/Heroes/Perseus/perseus.html