Deathwalker

"Deathwalker" is an episode from the first season of the science fiction television series Babylon 5. A war criminal arrives aboard the station with a stunning scientific discovery: a substance that offers possible immortality. Ambassador Kosh hires Talia Winters to telepathically monitor some transactions, and is instructed to meet up at the hour of scampering. Na'Toth meanwhile is waiting for a ship to dock, when she spots an individual disembarking from another ship. She goes wild shouting "Deathwalker" and attacks the woman until she is restrained. Sinclair and Garibaldi meet up to discuss the incident, and although she has all the outward trappings of a Minbari and has arrived from Minbari space it is clear she is not a Minbari. They have heard the name Deathwalker before. They question Na'Toth and find she has taken a blood oath to kill the Dilgar woman known as Deathwalker. Deathwalker was responsible for a series of experiments on Na'Toth's grandfather and other people,... full article at wikipedia