This was a pretty good job of pulling the various "family" threads together. One weakness, I thought, was the Danny and Baez/Rachel story. They sort of demonstrated someone else was guilty, but I didn't feel the story line was really closed off for Rachel. What I thought this episode really showed up was a question that I've been asking myself for nine years: why is Abigail Baker still a Detective? She is a woman of intelligence, competence and obvious authority. I thought in the very first season that as the Commissioner's Adjutant (which she clearly is) she should have at least the rank of Lieutenant. Frank was able to promote Sid from Sergeant without too much problem - might I suggest that both Sid and Abigail be promoted to Captain as rapidly as possible (perhaps with some equivalent nod to Garrett, who's nominally a higher level anyway), levelling the foundation supporting Frank's backup trio, and acknowledging the very equivalence of function that was pointed up in this episode.