Crusade is an American spin-off TV show from J. Michael Straczynski’s Babylon 5. Its plot is set in AD 2267, five years after the events of Babylon 5, and just after the movie A Call to Arms. The Drakh have released a nanovirus plague on Earth, which will destroy all life on Earth within five years if it is not stopped. The Victory class destroyer Excalibur has been sent out to look for anything that could help the search for a cure.
In 2267, six years after the end of the Shadow War, the Drakh, a former ally of the Shadows, attempt to destroy the Earth with a leftover Shadow Planet Killer. Interstellar Alliance president John Sheridan takes command of the Excalibur and Victory and leads the EarthForce and ISA fleets to victory. During the battle, the Drakh released a viral weapon into Earth’s atmosphere, infecting every living thing on the planet. In five years the virus will become active and kill everything. The Victory was destroyed in the battle, but the Excalibur survived. Command is turned over to Captain Matthew Gideon who is given a mission: explore the galaxy to find either a cure or an ally capable of producing one.
Like Babylon 5, Crusade was intended to have a five-year story arc, although as Straczynski notes in the DVD commentary for A Call To Arms, it was intended to resolve the Drakh plague after a season or two and move onto other storylines. Conflicts arose, however, between the producers and executives at TNT, and production was cancelled before the first episode was broadcast. Thirteen episodes were made and broadcast, with at least four more scripted. [Wikipedia]
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