Highlights from the Twenty First Episode of Season 4 of Blue Bloods

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets

Season 2 Episode 21 Photos - Blue Bloods - CBS.com

1. Season 2 Episode 21 Photos - Blue Bloods - CBS.com

“Above and Beyond” – When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.

2. "Above and Beyond" S4 E21

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.
Danny S4 E21

3. Danny S4 E21

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.
Danny Investigates S4 E21

4. Danny Investigates S4 E21

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.
Jamie Gets Heated S4 E21

5. Jamie Gets Heated S4 E21

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.
Frank Turns Up The Heat S4 E21

6. Frank Turns Up The Heat S4 E21

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret. Meanwhile, Jamie and Eddie help Nicky track down a former classmate who is living on the streets.