In the first steps towards the foundation of the Federation, Captain Archer and the crew must stop Paxton, a well-armed, radical human isolationist leader, who is threatening to destroy Starfleet Command unless all aliens leave Earth immediately.

Peter Weller (John Frederick Paxton)

Harry Groener (Minister Nathan Samuels)
Gary Graham (Ambassador Soval)
Eric Pierpoint (Agent Harris)
Adam Clark (Josiah)
Peter Mensah (Daniel Greaves)
Johanna Watts (Gannet Brooks)
Derek Magyar (Commander Kelby)
Joel Swetow (Ambassador Thoris)

Josh Holt (Ensign Masaro)
Amy Rohren (Tactical Officer)
Porthos

• Part 2 of 2. Originally aired May 13, 2005 at 8:00 PM, followed by the Series Finale at 9:00 PM.
  
• Mayweather finds that his former girlfriend Gannet Brooks works for Starfleet Intelligence.
  
• With Archer, Trucker, Reed, and Mayweather off ship, Archer puts Hoshi in command of Enterprise.
  
• T'Pol discovers Paxton has Taggart's syndrome, and since he's not dead, he must be using Rigelian gene therapy. This makes him not only a terrorist, but a hypocrite as well.
  
• T'Pol and Tucker's baby girl, named Elizabeth after Tucker's sister, was created from DNA stolen from Enterprise by Ensign Masaro. The baby died shortly after due to faulty cloning by Dr. Mercer.
  
• Masaro tries to frame Kelby for the sabotage on Shuttlepod 1, but when cornered by Archer, Masaro kills himself.