Written by Nicholas Briggs, Doctor Who - The Defectors is the first of the informally titled, "Locum Doctors" trilogy taking us up to the two-hundredth Doctor Who main range tale; each one putting the Doctor back in his own history to meet old faces in new and deadly situations!

Jo Grant is shocked to find most of her colleagues are missing. Then she discovers that the Doctor has inexplicably changed.

But there’s no time to worry about it, as she and her misplaced Time Lord friend are whisked to the mysterious Delphin Isle on a matter of national security. There, they encounter a disturbingly odd form of local hospitality and learn of a highly classified incident that took place during the Cold War.

Why exactly have they been brought here? And what is the truth concerning the bodies in the harbour and the vast project being undertaken beneath a cloak of secrecy?

Doctor Who - The Defectors is now available on Download, with the CD version now speeding out of our warehouse on its journey to those who pre-ordered. As ever, exclusively to the Big Finish site, anyone who's bought on CD will find a Download version on their account in case they want to listen right now.

The next story is May's Doctor Who - Last of the Cybermen, followed by June's Doctor Who - The Secret History. Subscriptions can be bought for the main Doctor Who range, not only offering a saving against buying the stories individually, but also giving access to site-exclusive downloadable PDF scripts, extended extras, and four specially-commissioned Doctor Who short story recordings.