3 forgotten Blue Bloods characters who will return for season 14

The cop drama digs into the past as it enters its final season.

ÃÂ¢Stirring the PotÃÂ£ ÃÂ Erin and Frank clash over new legislation from the district attorneyÃÂ¥s office that undermines FrankÃÂ¥s policies. Also, Erin is at odds with Governor Mendez (David Zayas) over questionable sex-trafficking laws; Danny risks his badge to protect a friend from losing his; and an accident on the job forces Jamie to question whether heÃÂ¥s ready to be a sergeant, on BLUE BLOODS, Friday, Nov. 16 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured: Donnie /

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Blue Bloods is winding down the clock. The lives of the Reagan family members will go on, of course, but their weekly adventures will come to a close after season 14, which makes each new episode an event. We never know which exchange will be a character's last, or what life-changing decisions they will make along the way.

The Blue Bloods producers are very aware of the show's legacy, and as such, a push has been made to incorporate characters that fans haven't seen or heard from in quite some time. Some of them are villains, or antiheroes at best, while others are cops who used to be central to the show's popularity.

Here are the returning Blue Bloods characters you may have forgotten:

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