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 unleashed a nanovirus plague on Earth, which will wipe out all life on the planet within five years if it is not contained. To that end, the Victory class destroyer Excalibur has been dispatched to search for anything that could aid in finding a cure.
