I was late to the party and watched this during the pandemic, but its so good I've recently watched it again and can't say enough good things about this show and the two main characters, Holden and Linden, deftly acted by Joel Kinnaman and Mireille Enos. They are such well written, albeit flawed characters but their relationship is truly one for the ages, so tough and tender, heartwrenching at times, it definitely takes center stage. Although the criminal investigations are compelling too. Definitely worth watching, and watching again. I loved it! One of the best American shows.