: In the prequel series Dexter: Original Sin , her character is expanded, showing the messy, unrefined nature of Dexter's first attempt at his signature killing ritual. Portrayals
Mary targeted patients who had a history of substance abuse, alcoholism, or heavy smoking. She viewed them with deep disgust, labeling them "slaves of their own compulsions". nurse mary dexter
In the original flagship adaptation, she turned to lethal overdoses of morphine. She masked the resulting respiratory failure as a natural complication of her victims' pre-existing terminal or failing health conditions. The Catalyst for the Code : In the prequel series Dexter: Original Sin