This week, Noah and Chance saw the artful new alien invasion film “Arrival.” Directed by Denis Villeneuve, it stars Amy Adams and Jeremy Renner as scientists charged with discovering shell-shaped spacecrafts’ purpose on Earth. That familiar premise led Noah and Chance to argue whether “Arrival” is a relative of movies we’ve seen before or something more meditative with stranger designs. Spoilers are broached in the back half of the show; plus, is this a comforting picture of human potential in the wake of the presidential election?