Crusade is an American Spin off Television show from J. Michael Straczynski's Babylon 5. Its storyline is set in AD 2267, five years following the events of Babylon 5, and also only after the movie A Call to Arms. The Drakh have released a nanovirus jolt if it's not stopped on the planet, which will destroy all life on the planet over five years. To the end, the Victory class destroyer Excalibur has been sent out to look.