Editing Babylon 5 (section)

=== Season 3: Point of No Return (1995–1996) ===
Sheridan and Delenn establish a "conspiracy of light" to fight the influence of the Shadows. When Clark declares martial law, Sheridan declares ''Babylon 5''{{'s}} independence from the Earth government. Mollari realizes his deal with Mr. Morden has become dangerous but is unable to end it. As the Shadows cause conflict and chaos throughout the galaxy, Sheridan confronts Kosh and successfully convinces the Vorlons to provide military assistance against them. In retaliation for Vorlon intervention, the Shadows assassinate Kosh. Sinclair travels back in time a thousand years to aid the Minbari in the previous Shadow War, becoming the legendary Minbari religious leader Valen. Sheridan discovers vulnerabilities in the Shadow vessels and learns to predict their objectives, leading to the first major military defeat of the Shadows. Despite Kosh's warnings, Sheridan confronts the Shadows on their homeworld Z'ha'dum. He crashes a spacecraft packed with nuclear weapons into the planet, seemingly dying in the explosion.