TV Guide is reporting, “Firehouse 51 is once again under siege! This time, however, Chicago Fire’s brave firefighters won’t be at the mercy of dangerous criminals. Thursday’s thrilling episode will see the crew helping out the FBI with an undercover mission, and TV Guide has your first look.
In this exclusive sneak peek, Severide (Taylor Kinney), Casey (Jesse Spencer) and the rest of the gang are stunned to see an onslaught of mysterious black SUVs race into the firehouse’s driveway unannounced. Confused by their sudden arrival, Boden (Eamonn Walker) immediately tries to get to the bottom of things.
“What the hell is this,” he inquires in the video…”