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 Tony Plana Guest Star Carlos Leal Guest Star Juan Javier Cardenas Guest Star Natalia Castellanos Guest Star Christopher Goodman Guest Star Gerald Webb Guest Star Robert Henry Guest Star Gerry Del Sol Guest Star Jeff Torres Guest Star Scott Dean Guest Star Elka Rodriguez Guest Star Oliver Rayon Guest Star John Patrick Barry Guest Star Mark Gordon Executive Producer Erica Messer Executive Producer Nicholas Pepper Executive Producer Erica Meredith Writer Tawnia McKiernan Director