Gary Sinise Unit Chief Jack Garrett Actor Alana De La Garza Clara Seger Actor Daniel Henney Matthew Simmons Actor Tyler James Williams Russ "Monty" Montgomery Actor Annie Funke Mae Jarvis Actor Matt Cohen Ryan Garrett , aka Cole Dabb Guest Star Arturo Del Puerto Officer Roberto Calderon Guest Star Rebeka Montoya Ana Sofia Guest Star Kin Santiago Arturo Guest Star Sofia Vassilieva Roxy Bental Guest Star Daniel Rashid Lee Kern Guest Star Luis Moncada Hector Pedroza Guest Star Esai Morales Section Chief Mateo Cruz Guest Star Sophia Santi Medical Examiner Camila Granado Guest Star Liza Fernandez Alma Gonzalez Guest Star Ydaiber Orozco Teresa Gonzalez Guest Star John Romano Robert Miller Guest Star Mark Gordon Executive Producer Erica Messer Executive Producer Nicholas Pepper Executive Producer Adam Glass Executive Producer, Writer Rod Holcomb Director