4-11: Observer Effect
With Hoshi and Trip suffering from a fatal illness, Organians study the Enterprise crew.
4-18: In a Mirror, Darkly
In the mirror universe, a radically different Enterprise crew searches for the technologically-superior U.S.S Defiant, trapped from our universe.
4-14: The Aenar
Archer and Shran seek out the Aenar, an Andorian subspecies, to investigate their connection with recent attacks.