Frank Reagan S4 E22
When Danny is placed on modified duty after investigating a case that was off-limits, he realizes he stumbled upon something that someone is trying to keep quiet. When he passes the tip on to his father, Frank is alarmed when he learns the enormity of this case and the internal involvement, on the fourth season finale of BLUE BLOODS. Pictured: Tom Selleck as Frank Reagan. Photo: Craig Blankenhorn/CBS ©2013 CBS Broadcasting Inc. All Rights Reserved.