Instinct, written by Treena Hancock and Melissa R. Byer, opens with a bit of a nod to An American Werewolf in London. McKay (David Hewlett), Ronon (Jason Momoa), Sheppard (Joe Flanigan) and Teyla (Rachel Luttrell) enter a pub house on a distant world. They are unwelcome and urged to leave, but one of them warns…