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A young woman almost loses her life when someone breaks into her house, stabs her and leaves her dying on the floor waiting for 911 to arrive. However, the danger isn’t over yet, when the man returns while Calleigh is searching the house and puts a bag over her face, attempting to strangle her to death. Meanwhile, Horatio uncovers that the Russian mob has targeted his team, resulting in a shootout with a suspect shot in the head. Later on, Ryan is kidnapped from his car and the CSI’s must hurry to find him.