On this blog, I post reference information regarding continuity and storyline dependencies in the audio adventures of Doctor Who produced by Big Finish.
These are not chronology guides, per se--they just tell you which stories you might want to listen to before you listen to other stories.
Also, keep in mind that most Big Finish stories can be listened to and enjoyed on their own, even if they're part of a larger storyline! This is just for continuity freaks (like me) who like to move through things in order, or at least know exactly what it is they're skipping.
I create the graphs using a free online app called draw.io, which is great.
Questions, comments, suggestions, and feedback are great! Maybe you can help me make these guides better! Just send me a note in my ask box.
If you scroll back long enough, you'll also see some reviews of Big Finish audios I wrote a while ago.