The Master of Callous (audio anthology)

 was a full cast audio anthology released on 5 December 2018 by Big Finish Productions. It was the second release in The War Master audio series and featured Derek Jacobi as the War Master.

Publisher's summary
On the mining colony Callous, Elliot King struggles to meet the demands of its governor, Teremon. The odds are stacked against him, and his options are running low. The world that once promised dreams now offers only despair.

A wild Ood stalks the forests, carrying an antiquated phone. The caller promises much – he claims he can change the world – but he always speaks a devastating truth.

He is the Master and the Ood will obey him... but to what end?

1. Call for the Dead by James Goss

2. The Glittering Prize by James Goss

3. The Persistence of Dreams by Guy Adams

4. Sins of the Father by Guy Adams