While looking for Smitty's killer, Muldoon and Bullman find themselves in the line of fire. Deirdre and Sean realize they are not on the same page, and Duffy and Barbara have a fun drunken night out. Sgt. Mike invites Patton out to visit him in order to gain some traction with the Mr. O murder investigation. O'Bannon is put to the test when Muldoon includes him in a dangerous pursuit.

Cast: Katrina Bowden, Audrey Esparza, Neal McDonough, Edward Burns, Michael Rapaport, Lyndon Smith, Kevin Corrigan, Michele Hicks, Austin Stowell, Brian Dennehy, Elizabeth Masucci, Lili Mirojnick, Wass Stevens, Fredric Lehne, Brian Wiles