It’s been a little over five months since we last laid eyes on Portland á la Grimm. As season premieres go, “Thanks for the Memories” doesn’t disappoint; in fact, it has me excited for what this new season of Grimm has in store. I enjoy how the beginning of “Thanks for the Memories” addresses what transpired in the season three finale and continues along the path any good police procedural would — the investigation into the captain’s shooter and his subsequent beheading.