Enterprise journeys to a planet a Xindi ship visited. Once on the planet, though, Archer, Reed and Hoshi become infected with a strange mutating virus.
As the nation remains vulnerable, Jack Bauer endures the worsening pathogen pain. The FBI deals with recent deadly developments while matters involving key players takes this day into a unexpected direction.
The team looks for an expert sniper when his connection to an extremist group is revealed.
A revelation about the fate of the colony forces the Bowman family to make an impossible choice.
