The trailer is now online for the fourth series of Jago and Litefoot, which is out in March.
Listen out for clips from each of the four stories, with teases of Jago's new love Abigail Woburn, the dangerous Mr Gadd, the train ride to nowhere, Professor Dark... and the mysterious Mr Kempston and Mr Hardwick.
Jago and Litefoot - Series 4 stars Christopher Benjamin, Trevor Baxter, Louise Jameson and Colin Baker and is available for pre-order now.
It's ten years since Nick Briggs became co-executive producer of Big Finish Productions. His friends and colleagues celebrate this fact in a not entirely serious tribute.