A rogue former surgeon and Theresa's ex-boyfriend who invented an unstable cell regeneration serum, requiring him to murder patients for periodic extracts. He is the main antagonist.
Matar is Theresa's former boyfriend whom she previously had fired.
Matar infiltrates the hospital and leaves Stein's body hanging.
Lt. McEllwaine's police unit subdues Matar during his initial capture.
Matar specifically targets the director who previously covered for Stein.
Matar eliminates anyone obstructing his path, including the intern.
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