Gray was DEFINITELY a disappointment and how quickly he was wrote in and dispensed with left me feeling like there was a lack of adequate use of an amazingly intense plotline and not enough closure.
I also do not buy the Jack being buried for 1900 years. There was NOT enough impact on that one for the writers and directors to make it believable for me. That really annoyed me and still does.
On the whole... wow, what a powerful episode. And in spite of the alcohol I drank to prepare, Tosh's goodbye video still had me in tears. I really loved her char. :( :(