11. The Darkness and the Light

Kira is shocked and saddened when Latha Mabrin, a fellow former member of Kira's resistance cell, is murdered. Kira's shock turns to fear when she receives a message consisting of a picture of Latha and a garbled voice saying, "That's one." Kira interprets the message as a threat to all the former members of the cell, and frets that if she were not pregnant as a surrogate mother for Keiko and Miles O'Brien 's child she would be better able to protect her comrades.

Kira makes arrangements to transport resistance member Fala onto a runabout returning to Deep Space Nine for her protection; but the transport is sabotaged, and Fala is killed. Kira soon receives a message from the scrambled voice saying "That's two". Later, while working on the case with security chief Odo, Kira receives a "That's three" message displaying the face of Mobara, another member of the cell.

Furel and Lupaza, two more former comrades, come to Deep Space Nine, offering to hunt down the assassin for Kira. She prefers to handle her problem within the boundaries of the law, but allows Furel and Lupaza to stay with her in the O'Briens' quarters. During a staff meeting, Odo surmises that whoever is doing the killing most likely has a vendetta against Kira—and that she is also a likely target, and she notices that the recordings are a modification of her own voice. Soon Furel and Lupaza are killed by an explosion in the O'Brien quarters.

Kira steals a list of suspects from Odo's office and takes off to investigate. She soon arrives at the home of Silaran Prin, one of the suspects. Prin captures and immobilizes her, and explains his motivation.

Prin, a Cardassian civilian who was disfigured in a Resistance bombing, is punishing those responsible. He accuses Kira of killing indiscriminately, while he kills only the guilty. She counters that the Cardassians were a hostile alien race occupying Bajor, and even if he was a civilian he was indirectly aiding the occupation and therefore a legitimate target. Prin tells Kira that he will spare her baby, but kill her, and prepares to operate. Kira begs for a sedative, realizing that the herbs she has taken for her pregnancy render most sedatives ineffective. She pretends to fall asleep, then lunges at Silaran, attacking and killing him. When the Deep Space Nine crew arrives to rescue her, Prin is already dead, and Kira, shaken, only wants to go home.