In Thursday's new episode (10/9c, USA), he and Hank (Kevin Daniels) must relay the last words of a dying man. However, Brian goes way above the call of duty to figure out just who those words were meant for and how to deliver the important message.
Check out this exclusive sneak peek to see Brian solve the mystery "CSI: Chicago"-style, and why it means so much to him to help the patient.(Hint: it has something to do with a Betty White TV movie.)
Sirens airs Thursdays at 10/9c on USA.