The Fourth Doctor Adventures: Series 9: Volume 1

 was a full cast audio anthology released on January 2020 by Big Finish Productions. It featured the Fourth Doctor, Adric, Romana II and K9 Mark II.

Publisher's summary
Purgatory 12 by Marc Platt

The TARDIS lands on a penal asteroid within e-space...

Chase the Night by Jonathan Morris

On a planet where the daylight kills, the travellers are aboard a train that forever chases the night.

Featured actors

 * Tom Baker
 * Lalla Ward
 * Matthew Waterhouse
 * John Leeson