I got my first 4K TV, and I was looking for content to see what all the fuss is about. I stumbled on this show because it seemed to have spectacular underwater footage to see the TV's capabilities (and, after tweaking settings the TV, I do understand what the fuss is about).
But that's not the point. This is really an extraordinary documentary about a man's relationship with an Octopus that he develops while visiting it every day while snorkeling.
Putting aside the relationship, it shows how beautiful, resilient and intelligent this creature is. I highly recommend it.