7. The Book of Kells (Eighth Doctor Adventures, 2010)
This story takes place in the middle of season four of the Eighth Doctor Adventures. Now, really, all four seasons tie into each other and all the episodes tie into each other, so you do yourself an injustice if you dont listen to all of them. That said, this, and some of the others, can be heard as stand-alone stories. And as stand-alones go, this is one of the better ones. You get the Doctor, his new companion, Tamsin (Niky Wardley), and a certain odd Monk by the name of Abbot Thelonius (Graeme Garden). Theres also some lovely historical elements and a really well-written script that shows what an interesting companion Tamsin can be.