The One Chicago fall finales left Us with a lot of questions after putting multiple lives in jeopardy and teasing a Firehouse 51 shakeup that could change everything. Chicago Med, Chicago Fire and Chicago P.D.'s respective Wednesday, November 12, cliffhangers have many fans reeling - and we're explaining them all. Med kicked off the night by teasing a possible love triangle before diving into a darker story line involving Dr. Caitlin Lenox (Sarah Ramos) and a former patient.