Dr Who: Earthshock by Ian Marter, 1983, Wisconsin Digital Library.
Another audio, but a narrated novelization and not one of the shows with horrible, horrible audio quality and a voiceover. I was thinking this was an original novel but it might be a novelization of a Dr. Who story arc. Look it up yourself.
That's about all I have to say. I'm 7-10 books behind on note taking and writte-ups. I was looking up plot summaries online and am not certain if I am mixing two different audiobooks together.
I do recall this being decent but not great.