Sadly, the Companion Chronicles are coming to an end with this season. So here are the final season reviews for these audios. Sniff.
8.01 - Mastermind 
8.02 - The Alchemists
8.03 - Upstairs
8.04 - Ghost in the Machine
8.05 - The Beginning
8.06 - The Dying Light
8.07 - Luna Romana
8.08 - The Sleeping City
8.09 - Starborn
8.10 - The War to End All Wars
8.11 - The Elixir of Doom
8.12 - Second Chances