Marlyne Barrett stars as Maggie Lockwood, the charge nurse and the eyes, ears and brain of the emergency department, in the NBC drama “Chicago Med.” Maggie is skilled and confident but finds herself dealing with profound health issues. 

Barrett is well known to audiences for her portrayal of Council President Nerese Campbell on the critically acclaimed HBO series “The Wire.” She was also Ian McShane’s trustworthy attaché Tomasina on NBC’s “Kings” and appeared on the popular FX series “Damages,” opposite Glenn Close and Rose Byrne. Additionally, she was seen on John Ridley’s ABC ...