Finally, the series is definitely not dead. The storytelling is interesting and the first part of the season finale is really great. Its conclusion with Michael confessing that he killed Ana Lucia and Libby was really powerful.
The flashbacks of Desmond were really interesting. Once again, these are his first flashbacks, I imagine that the second one will not be as exciting, as usual.
The only thing I did not like was Libby appearing in the flashback - with her horrible wig - offering her boat to Desmond. I really think the writers went too far with interconnecting every single character between each others.
And once again, a poor CGI scene in the series. There's a horrible CGI bird at one point. Just horrible.
A great first part of the season finale. I cannot wait to see the next episode. I give it 8 out of 10.