Tol Skorr was a Jedi Knight of the Old Republic who followed Count Dooku to the Dark Side at the beginning of the Clone Wars. As a Jedi, Tol Skorr was once shot down by pirates over Korriban. Saved by Count Dooku, Skorr's loyalty to him was unwavering ever since. When Dooku left the Jedi Order to form the Confederacy of Independent Systems and incite the Separatist crisis. As the crisis grew and Dooku sought to sow more dissent in the galaxy, Skorr was joined by the likes of Kadrian Sey, Sora Bulq, and Asajj Ventress as members of Dooku's inner circle.

As one of Dooku's minions, the Count always liked to test his followers' loyalty and would play Tol Skorr and Kadrian Sey against each other each sought Dooku's favor. When Quinlan Vos came to join Dooku, Skorr maintained doubt regarding just where Vos' true loyalties lay. Shortly after Vos joined the group, Dooku conducted a series of mission to test Vos' loyalty and effectiveness. They traveled to Tibrin to depose leader Suribran Tu and welcome Tibrin into the Confederacy.

The next stop was Kiffu, Quinlan's home world where Dooku hoped to convince Sheyf Tinte, incidentally a relative of Vos', to allow the Separatists to establish a base on Kiffu. When the Tinte refused, Dooku order Skorr, Sey, and Vos to kill her as well as her guards. During the fight, Vos refused to allow the Dark Jedi to kill his relative, despite their conflicted past. As Tol and Kadrian dealt with the Kiffar Guardians, Vos tried to escape with Tinte, but was followed by Dooku who provoked Vos into killing Tinte, an act that put many of Dooku's doubts about Vos' loyalty to rest.