They did an amazing job with this episode! You really saw the character developing (?). In Nick's case you really saw the emotion very good, but you could see that on everybody's faces. I especially liked the part when got the tape from the kidnapper. It was really good. Not just 'Grave Danger (1)' was good, but part 2 was fantastic too. But from the beginning you already knew in the back of your head, he wasn't going to die. He was too important for the show. I loved the way Warrick expresed himself, when he found out what happend to Nick at the crime scene. He realized that he could be buried alive.
I just loved the episode!