I caught up on the whole series last year because my daughters enjoyed it so much. Season 5 (just completed) seemed a little much, however. You are probably just fine with what you’ve seen. Then watch the wrap up when Season 6 comes out on PBS next year.
One of my daughters called my attention to the dog at the beginning of Season 5. “How old is that dog, anyway?” she asked. “She should be dead by now.”
Sure enough, poor old Isis died towards the end of Season 5, spending her last night on the silken coverlet of Cora’s bed.
I can’t watch anything where the dog dies, LOL!