The Robots: Volume Four

 was a full cast audio anthology released in June 2021 by Big Finish Productions. It starred Nicola Walker as Liv Chenka and Claire Rushbrook as Tula Chenka.

Publisher's summary
During the events of Doctor Who - Ravenous 2, Liv Chenka left the Doctor and the TARDIS behind. Just for one year. A year during which she would live on Kaldor, and get to know her sister Tula all over again.

But Kaldor is going through a period of tumultuous change. Technology is changing at an advanced rate - the robots are evolving, artificial intelligence is adapting, and with these changes so politics is altering too. Dangerously.

Can Liv and Tula make a difference during the most turbulent time in the world’s history?

4.1 Closed Loop by Guy Adams

4.2 Off Grid by Sarah Grochala

4.3 The Janus Deception by Robert Whitelock

More story details to follow.