4-11: Observer Effect
With Hoshi and Trip suffering from a fatal illness, Organians study the Enterprise crew.
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.
4-05: Cold Station 12
The Augments attempt to steal the remaining genetically-engineered embryos from Cold Station 12.