"War Without End" is a two-part story consisting of the 16th and 17th episodes in the third season of the science fiction television series Babylon 5. They were broadcast first on May 13 and May 20, 1996 on the PTEN network in America. It marks the return of Michael O'Hare, who by mutual agreement departed the show as a regular after season one, reprising his role as Jeffrey Sinclair for the character's final appearance on the show. The story resolves many of the threads from "Babylon Squared", which detailed part of what happened to the Babylon 4 space station.

On Minbar, Ranger One is interrupted by an aide who presents him with an envelope which has been sealed in the Ranger archives for over 900 years. Ranger One pulls back his hood, revealing Jeffrey Sinclair. Sinclair travels to Babylon 5 and meets with Delenn, Marcus, Ivanova, Lennier, and Captain Sheridan and escorts them to the White Star, where they set off for a temporal rift in Sector 14. Meanwhile, Garibaldi investigates a distress signal coming from the temporal rift. The signal is from Ivanova aboard Babylon 5 which is under attack by the Shadows. The message is time-stamped from eight days in the future.

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