Jesse Spencer stars as recently elevated Capt. Matthew Casey, who leads the Truck Company and is unwavering in his commitment to the job, on NBC’s drama “Chicago Fire.”

An Australian native, Spencer made his American television debut in the critically acclaimed series “House,” playing Dr. Robert Chase opposite Hugh Laurie for all of the show’s eight seasons until the series ended in 2012.

Spencer’s film credits include a starring role in “Uptown Girls” with Brittany Murphy, the biopic “Swimming Upstream” with Geoffrey Rush and Judy Davis, and Spike Lee’s independent feature “G...