4-11: Observer Effect
With Hoshi and Trip suffering from a fatal illness, Organians study the Enterprise crew.
4-07: The Forge
After a terrorist attack on Vulcan kills Admiral Forest, an investigation leads Enterprise to believe that an secluded group called the Syrrannites is responsible.
A fanatical group of xenophobes attempt to rid Earth of all non-humans and end all extraterrestrial relations.
T’Pau and T'Pol's mother, both Syrrannites, assist Archer and T’Pol search for the Kir'Shara and uncover the truth behind the terrorist attack.