"The Extra Mile" -- When a key eyewitness in a murder trial flees out of fear of retaliation, Erin and Anthony spearhead their own two-person manhunt to find him and convince him to testify. Also, Garrett tries to convince Frank to attend the Police Union party, and Danny and Baez take a closer look at a suspicious convenience store robbery, on BLUE BLOODS, Friday, April 29 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured: Bridget Moynahan as Erin Reagan. Photo: Giovanni Rufino/CBS ÃÂ©2016 CBS Broadcasting Inc. All Rights Reserved. | Episode 6.21 - The Extra Mile | Promotional Episode Photos | Season 6 | blue-bloods | Gallery

SpoilerTV Image Archive | Gallery | blue-bloods | Season 6 | Promotional Episode Photos | Episode 6.21 - The Extra Mile | "The Extra Mile" -- When a key eyewitness in a murder trial flees out of fear of retaliation, Erin and Anthony spearhead their own two-person manhunt to find him and convince him to testify. Also, Garrett tries to convince Frank to attend the Police Union party, and Danny and Baez take a closer look at a suspicious convenience store robbery, on BLUE BLOODS, Friday, April 29 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured: Bridget Moynahan as Erin Reagan. Photo: Giovanni Rufino/CBS ÃÂ©2016 CBS Broadcasting Inc. All Rights Reserved.

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