The deal comes on the same day as the start of production for Season 7.
Selleck plays NYPD Commissioner Frank Reagan on the show who heads both the police force and the Reagan brood. Frank runs his department as diplomatically as he runs his family, even when dealing with the politics that plagued his father, played by Len Cariou, during his stint as Chief.
Donnie Wahlberg, Bridget Moynihan, Will Estes, Amy Carlson, Marissa Ramirez, Tony Terraciano, Andrew Terraciano and Sami Gayle also star.
'Blue Bloods' returns Friday, Sept. 23 at 10/9c on CBS.
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