The breakneck pace of Season 4 was primarily driven by real-world uncertainty.
: Season 4 ends with the departure of Susan Ivanova (Claudia Christian) and the death of Marcus Cole , who sacrifices his life to save hers using an alien healing device. Babylon 5 - Season 4
The fourth season of Babylon 5 , titled is widely considered the show's narrative climax. Spanning the year 2261, it resolves the two massive conflicts that had been building since the series began: the war with the Shadows and the liberation of Earth. Narrative Highlights The breakneck pace of Season 4 was primarily