Guest Stars Stella Maeve as Nadia Decotis Kevin J. O'Connor as Commander Fischer Bailey Chase as DEA Special Agent David Lang Spencer Grammer as K-9 Officer Jenn Cassidy Jay Whittaker as Trenton Bostaph Co Starring Melissa Carlson as Meredith Olinsky Jeremy Earl as Carl "Blue" Johnson Patrick Clear as Judge Darrin Lachlan Andre Teamer as Gary Brother #1 Ronnel Taylor as Gary Brother #2 John Ferrick as Evan Lormer Kristin Andersson as Elisha Nicotero Richard Traub as Seth Morgan Dawn Bless as Evidence Room Officer Heidi Drennan as Secretary