Darnak was a low-level politician on Detrios.
When the oppressed native lizard people attacked the Detrian citadel, Darnak convinced Jason they were evil. Dr. Who built an ACME Lizard Monster Eradicator and killed ninety percent of the lizards on the planet. Darnak's insufficient gratitude caused Jason to create a giant dinosaur that attacked the Citadel. Jason defeated it, but not before several guards had been killed and the Citadel itself destroyed. He left the planet with Dr. Who, with Darnak having to explain the aftermath to his superiors. (PROSE: Head Games)