Babylon 5: Season 3, Episode 16

3 - 16: War Without End, Part One

When Ivanova receives a distress call from herself pleading for help as the Shadows destroy Babylon 5, the crew are stunned to discover it is dated eight days into the future. At the same time, on Minbar, Sinclair receives a nine-hundred-year-old letter from Valen, prompting Delenn to reveal a long kept secret.