Seska is a fictional character in Star Trek: Voyager played by Martha Hackett. Seska first appears in the episode "Parallax", as a Bajoran crewmember absorbed from the Maquis ship in the episode "Caretaker". In the episode "State of Flux", she is revealed to be a Cardassian undercover agent who had infiltrated the Maquis cell. During her time with the Maquis, Seska had a love affair with her commander, former Starfleet officer Chakotay, and befriended the half-Klingon, half-human B'Elanna Torres. Seska's former relationship with Chakotay would later prove key to her plan to capture Voyager in the double-episode story "Basics." Once aboard Voyager, Seska slowly melded into a normal life with the mixed Starfleet-Maquis crew, a process not without difficulty. Eventually, after several clashes with the ship's rigid command structure and increasing frustration with the command of Captain Kathryn Janeway, Seska detached herself from the rest of the crew and began funneling assistance to the Kazon. She was caught while attempting to deliver replicator technology to the enemy, and upon her apprehension, her true Cardassian identity was discovered by the Doctor. Seska fled to the Kazon whereupon Jal Culluh took her as a lover. Seska was killed when the Voyager crew successfully retook the ship from the Kazon. Her child was taken by Culluh. (via Wikipedia)