The Companion Chronicles season 4 audio dramas list:
4.01 - The Drowned World 
4.02 - The Glorious Revolution
4.03 - The Prisoner of Peladon
4.04 - The Pyralis Effect
4.05 - Ringpullworld
4.06 - Bernice Summerfield and the Criminal Code
4.07 - The Suffering
4.08 - The Emperor of Eternity
4.09 - The Shadow of the Past
4.10 - The Time Vampire
4.11 - Night’s Black Agents
4.12 - Solitaire