Only the Good (audio anthology)

 was a full cast audio anthology released in December 2017 by Big Finish Productions. It starred, played by Derek Jacobi.

Publisher's summary
Four brand-new full-cast featuring the Master’s exploits in the Time War.

1. Beneath the Viscoid by Nicholas Briggs

On the ocean planet Gardezza, deep beneath the Viscoid, a mysterious capsule is recovered from the Time War, and an equally mysterious stranger found within. The Doctor’s reputation precedes him, even here... but can he be trusted?

2. The Good Master by Janine H Jones

The Time War rages around Arcking - a planet serving as a sanctuary for the sick and injured. But Arcking is protected by a mysterious, powerful force: a force the Master will stop at nothing to harness... even if time itself is against him.

3. The Sky Man by James Goss

When his new companion decides to save a planet, the Master indulges this most futile of requests. Materialising on a primitive, agrarian world, both the strangers quickly find their place in it... until fallout from the War invades their happy paradise.

4. The Heavenly Paradigm by Guy Adams

With his plans approaching fruition, the Master travels to Stamford Bridge in the 1970s: a location he believes might hold the key to his success. But what terrible secret lurks under the stairs of No. 24 Marigold Lane? And what sacrifices will the Master make in the name of ultimate victory?