This fourth season of “The Walking Dead” has been particularly upsetting. We lost some good ones this go-around, and the group’s arrival at Terminus last week doesn’t have any of us feeling all that relieved. (Did anyone else get a “Hiawatha’s Rabbit Hunt” vibe at the end of that episode?) Show creator Robert Kirkman promises Sunday’s season finale will be “intense” and “shocking.” If it gets too hard to take, remember: just look at the flowers. The finale airs at 9 p.m. on AMC.