Awwww, that last scene with Bobby. Simple and effective.
I.P. Freeley saved the Titanic....
Castiel, you naughty, interfere with the prime directive angel. Fate looked like Reese Witherspoon in librarian's clothes. So, I guess she wasn't a Dean kind of librarian.
Castiel didn't have any problems lying to the brothers, did he? Even if they are his "favorite pets."
EDIT-and they did get the timing right, didn't they? The Titanic sank 99 years ago this morning.