Jardak was a male Klingon serving in the Klingon Defense Force in the 23rd century. As of 2287, he served as Captain of the IKS Zan'zi, in that year, was ordered by Chancellor Kesh to destroy the Klingon prison on planet Pao'la, and to ensure any evidence of Starfleet officers being held there was contained. While en route, Kesh was deposed, and Klingon Councillor Gorkon rose to the Chancellor's seat. Gorkon then issued new orders to the Zan'zi, ordering the Federation prisoners be released safely. As the previous order to destroy the prison was not specifically rescinded, Jardak had the Zan'zi open fire on the facility, killing approximately 1000 prisoners and guards. (TOS novel: In the Name of Honor)

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