Kest

Kest was a Krattorian slave trader whose ship landed on Skaro to collect sand.

He was the only member of his crew not killed by the Daleks, who also captured his slaves and ship. Kest offered to give the secrets of space travel to the Daleks in return for the deaths of Sala and Astolith, but was really planning to recapture his ship. He was killed when he was caught in his ship's blast-off as his slaves escaped. (TV21: Power Play)