With Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou. Gormley tries to locate a former NYPD detective he believes may be a threat to Frank's safety; Erin navigates office politics when she chooses to reopen a closed case; Jamie is transferred to a new precinct with a lot of problems.
The story dynamic on the show just took some major turns. I like Jamie becoming a sergeant and what this portends for the show as well as the romantic dynamic with his fiancee. I also like the way that Baker’s character has been moving forward on the show.