Highlights from the Seventeenth Episode of Season 4 of Blue Bloods

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism.

Season 4 Episode 17 - Blue Bloods - CBS.com

1. Season 4 Episode 17 - Blue Bloods - CBS.com

"Knockout Game" — Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Danny Investigates S4 E17

2. Danny Investigates S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan, Josh Segarra as Mike Rose, and Rose Hemingway as Stephanie Rose. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Knockout Game S4 E17

3. Knockout Game S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan, Josh Segarra as Mike Rose, and Rose Hemingway as Stephanie Rose. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Game Consequences S4 E17

4. Game Consequences S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan, Josh Segarra as Mike Rose, and Rose Hemingway as Stephanie Rose. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Danny on the Scene S4 E17

5. Danny on the Scene S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan, Josh Segarra as Mike Rose, and Rose Hemingway as Stephanie Rose. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Danny Reagan S4 E17

6. Danny Reagan S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan, Josh Segarra as Mike Rose, and Rose Hemingway as Stephanie Rose. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.
Knock Knock S4 E17

7. Knock Knock S4 E17

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism, on BLUE BLOODS. Pictured: Donnie Wahlberg as Danny Reagan. Photo: John Paul Filo/CBS ©2014 CBS Broadcasting Inc. All Rights Reserved.