The TARDIS brings the Doctor, Steven and Vicki to the Italian city of Ravenna in the year 540 – besieged by the army of the celebrated Byzantine general Belisarius. Caught up in the fighting, Steven ends up on a boat bound for Constantinople, the heart of the Roman Empire.

Rescuing Steven, however, is the least of the Doctor's problems – because he shouldn't be mixed up in this particular adventure at all. Someone has sabotaged his own personal timeline, putting him in the place of his First incarnation... but who, and why? The truth is about to be revealed – but at what cost to all of the Doctors, and to the whole future history of the planet Earth?

Big Finish proudly present Doctor Who: The Secret History, our 200th Doctor Who Main Range release, written by Eddie Robson and starring Peter Davison, Maureen O'Brien and Peter Purves.

Thank you to everyone who has joined us across 16 years of monthly Doctor Who adventures, and to all the Doctors, Companions, writers and thousands of supporting artists who have made them possible!

The journey continues next month with Doctor Who: We Are the Daleks.

And don't forget, you can still sign up to our Super Subscription of 42 recently announced titles for just £350. Offer must end July 1st, so order now!