Archer recruits Dr. Arik Soong from prison to track down a genetically-engineered group of radicals, whom he raised as children.
4-01: Storm Front, Part I
Trapped in Earth during World War II, Enterprise investigates dramatic changes in the timeline as a result of the Temporal Cold War.
A fanatical group of xenophobes attempt to rid Earth of all non-humans and end all extraterrestrial relations.
4-19: In a Mirror, Darkly, Part II
A power-struggle ensues for control of the U.S.S Defiant in the mirror universe.