← Previous Next → 2x10 Whistle Blower 4/5 (5 votes) First Aired: Jan. 06, 2012 on CBS Summary: When Erin's informant is murdered, she blames herself and works to help Danny discover who killed him.

Main Characters in this Episode

• Erin Reaga…
• Jamie Reagan
• Henry Reagan

Guest Stars Danny Reagan played by Donnie Wahlberg Frank Reagan played by Tom Selleck Jackie Curatola played by Jennifer Esposito Linda Reagan played by Amy Carlson Nicky Reagan-Boyle played by Sami Gayle Sgt. Anthony Renzulli played by Nicholas Turturro Garrett Moore played by Gregory Jbara Jenna Milo played by Roxanna Hope Dennis Driscoll played by Jay Patterson Parker played by Robert Bogue Jack Cavanaugh played by Kelly AuCoin Billy Reese played by Adam Scarimbolo Coreen played by Marnie Schulenburg Ray Milo played by Tyagi Schwartz Jerry Randall played by Neal Lerner Captain Browne played by Robert Funaro Detective Abigail Baker played by Abigail Hawk Jack Reagan played by Tony Terraciano Sean Reagan played by Andrew Terraciano Cop played by Mike Houston Woman played by Beth Dzuricky Tony - Hard Hat 1 played by Gino Cafarelli Undercover Detective played by Alex Ziwak Officer Acosta played by Ben Yannette Angela's Son played by Max Maslow Stanich played by Jack O'Connell (II) Lieutenant played by Josh Tower Construction Worker played by Gerard Sullivan Cadet played by Jeffrey Parrillo Union Member played by Joshua Schubart Franco - Hard Hat 2 played by Alan R. Rodriguez More