Vishnoor was a criminal from the planet Rillaan.
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He was sentenced to life imprisonment on the planet Hadante. He was recognized as the leader of the prisoners and was given the right to distribute the food to the other prisoners. After Dr. Daniel Jackson tried to convince several prisoners to not attempt escape in the unstable vortex of a forming wormhole, he considered it a challenge to his position and attacked Daniel. During the struggle, Linea used her technology to kill Vishnoor. (SG1: "Prisoners")