The Beast of Kravenos (audio story)

 was the first story in the sixth series of the Fourth Doctor Adventures, produced by Big Finish Productions. It was written by Justin Richards and featured Tom Baker as the Fourth Doctor, Lalla Ward as Romana II, John Leeson as K9, Christopher Benjamin as Henry Gordon Jago and Trevor Baxter as George Litefoot.

Publisher's summary
A stunning new star act is wowing the audiences of the New Regency Theatre. The modern mechanical marvel of canny canine charisma - the automated dog that can answer any question - the incomparable - the unbeatable - K9!

The Doctor and Romana have returned to Victorian London and been reunited with their old friends Professor George Litefoot and Henry Gordon Jago. However this is not merely a social visit. A terrifying crime spree is sweeping the capital, and the burglaries of 'The Knave' defy all logic.

Something impossibly dangerous is taking place amid the fog. Only the time travellers and their friends can stop it... but can they be sure they're all on the same side?

Part one
to be added

Part two
to be added

Cast

 * The Doctor - Tom Baker
 * Romana - Lalla Ward
 * K9 - John Leeson
 * Henry Gordon Jago - Christopher Benjamin
 * Professor George Litefoot - Trevor Baxter
 * Inspector Quick - Conrad Asquith
 * Sir Nicholas Asquin - Ed Stoppard

Continuity

 * Jago refers to how unusual it is that the Doctor has two female friends with the same unusual name. (AUDIO: The Justice of Jalxar)