Dorada

From Tardis Wiki, the free Doctor Who reference

Dorada was the home world of the Doradans. It was conquered by the Masters of Dorada and its inhabitants forced to work in underground factories. The Second Doctor, Ben Jackson and Polly Wright arrived on the planet, where they were also enslaved by the Masters. After a week of working for them, a group of rebel Doradans freed them and convinced them to kill the Masters. (PROSE: The Dream Masters)