The second season of Star Trek: Enterprise sees less focus on the Temporal Cold War and the conflicts between Vulcan and Andoria. Instead, the season embraces a more episodic format than that of the previous year. However, some service is given to the aforementioned story arcs and a new one is introduced involving the Klingon Empire's attempts to capture and incarcerate Captain Archer. The biggest change to impact Enterprise occurs in the season finale, when an attack against Earth by the Xindi wipes out seven million people. Enterprise NX-01 is refitted and sent on a new mission: to locate the Xindi and do everything possible to prevent a second attack.