The Xindi Crisis in the Delphic Expanse

After the 2153 attack, Enterprise entered the Delphic Expanse, a region surrounded by thick clouds and riddled with spatial anomalies that distorted the laws of physics. The crew had to find the Xindi homeworld and stop the weapon being built against Earth, with almost no allies and dwindling resources.

The Xindi turned out to be five related species, primates, arboreals, insectoids, reptilians and aquatics, governed by a fragile council. The anomalies came from huge spheres built by the Sphere-Builders, beings from another dimension who were reshaping the region to make it habitable for themselves and had deceived the Xindi about humanity. Archer gradually won over part of the council, including the scientist Degra, who had designed the weapon.

In early 2154, Reptilian and Insectoid forces nevertheless launched the weapon toward Earth. Archer boarded it and destroyed it before it could fire, while Enterprise and its new Xindi allies wrecked the Sphere network. The crisis, which cost many lives, ended with a peace between Earth and most of the Xindi.