Here is the list of the Season 6 of the Fourth Doctor Adventures from Big Finish. Woohoo!
6.1 - The Beast of Kravenos 
6.2 - The Eternal Battle
6.3 - The Silent Scream
6.4 - Dethras
6.5 - The Haunting of Malkin Place
6.6 - Subterranea
6.7 - The Movellan Grave
6.8 - Skin of the Sleek
6.9 - The Thief Who Stole Time