Babylon 5: Season 3, Episode 9

3 - 9: Point of No Return

When President Clark declares martial law throughout the Earth Alliance, Nightwatch prepares to take control of Babylon 5 by any means necessary, forcing Zack to decide whose side he's on. In an exercise of bad timing, the prophetic widow of Emperor Turhan visits the station, granting Londo the audience he's been requesting since Turhan died.