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A dangerous experiment takes place aboard the Excalibur. RICHARD BIGGS guest stars.
Two persecuted alien investigators believe that Earth is covertly invading them.
Gideon conducts an illegal raid to free a fugitive with information that could save Earth.
Galen warns Gideon not to explore a planet where the inhabitants were suddenly eradicated.
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- Premiered: June 9, 1999
- Rating: TV-PG
- Premise: A sequel to `Babylon 5' follows a starship crew's search for a cure to a deadly virus ravaging Earth. (more)