Archer, Reed and Major Hayes infiltrate a Xindi-Arboreal industrial colony to learn more about the weapon of mass destruction that will be used against Earth.

John Cothran Jr. (Gralik Durr)
Randy Oglesby (Degra)
Steven Culp (Major Hayes)

John Eddins (Xindi-Reptilian)
Jack Alsted (Xindi-Arboreal #2)
Sam Witwer (Xindi-Arboreal #3)

• Gralik's plant is manufacturing kemocite, but he is unaware that Degra is using it to manufacture weapons. The kemocite he gives Degra in the end is impure and will delay their progress considerably.
  
• Archer also manages to place a tracker on the Xindi shuttle.
  
• According to Gralik, there used to be a sixth species of Xindi, the Avians, but they were killed during the war that destroyed the Xindi homeworld. The other five species are now scattered across the Expanse. The Reptiles and Insectoids caused the destruction of the planet when they detonated bombs undereath the planet's unstable fault lines.
  
• Tucker enlists Phlox's help in examining the Xindi rifle. They utilize organic worm-like creatures to generate synaptic pulses.