In episode 2.24, "Charge of this Post", Flack is critically injured when a bomb goes off in a building he and Mac are evacuating. Until their rescue, Taylor is able to keep Flack alive using a shoelace and prior experience in the Beirut barracks bombings. Flack remains unconscious for the remainder of the episode, his concerned colleagues, especially Mac, standing vigil at his bedside. When Flack returns to work, his friends tease him about using his "battle wounds" to impress the ladies (episode 3.01, "People With Money").