Frank talks to his team about the possibility of making an exception to the age requirement to a Marine who saved a girl's life on Blue Bloods Season 12 Episode 18.
Frank isn't sure what to do when a Marine veteran who saved a girl's life asks to join the police force despite his age on Blue Bloods Season 12 Episode 18.
It may cause tension between Frank and Jamie when the mayor secretly selects Jamie as a member of his security detail on Blue Bloods Season 12 Episode 17.
Frank is blindsided when the mayor asks Jamie to be on his security detail on Blue Bloods. "Hidden Motive" is the 17th episode of the show's 12th season.
