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 Kelly Frye Kristy Simmons Guest Star James Kyson Joon-Ho Kim Guest Star Jennie Baek Su-bin Yoo Guest Star Eddie Shin Geonwoo Lee Guest Star Taylor Black Lauren Barrett Guest Star Ian Bratschie Grayson Faber Guest Star Briana White Jessica Townsend Guest Star June Kyoko Lu In-Sook Jong Guest Star Andrew Yun Choon-Hoon Guest Star Michael Rhys Kan Older Korean Man Guest Star Christina Lee Kirean News Anchor Guest Star Leo Seo ND Cop Guest Star Jake Choi Booker Guest Star Britt Bowman Elsa Byquist Guest Star Mark Gordon Executive Producer Erica Messer Executive Producer Nicholas Pepper Executive Producer Adam Glass Executive Producer Daniele Nathanson Writer Gregory Prange Director