On Babylon 5 , Sheridan reports to Lochley that the Earth has been contaminated by a biological weapon engineered by the Shadows ; experts calculate that the plague will adapt to human physiology and kill all life on Earth inside of five years .
A cure is found .
On Babylon 5 , Sheridan reports to Lochley that the Earth has been contaminated by a biological weapon engineered by the Shadows ; experts calculate that the plague will adapt to human physiology and kill all life on Earth inside of five years unless a cure is found .