(Note that at the time of this news going live, there's less than three hours left on our David Tennant Birthday special offers)

The Daleks return to Big Finish's main Doctor Who range with today's release of Doctor Who - Alien Heart / Dalek Soul starring Peter Davison, Sarah Sutton and Nicholas Briggs in the first of a three month run of two two-parter stories directed by Ken Bentley:

Alien Heart by Stephen Cole

In the TARDIS, the Doctor and Nyssa stumble across a trail of ten destroyed worlds, all of them obliterated by means of some utterly monstrous but utterly unknown device. The planet Traxana would seem to be next in line to suffer the same fate. But when the TARDIS lands on an outpost on Traxana’s moon, Nyssa is carried away by a tide of giant green arachnoids, leaving the Doctor behind…

And the coming menace is closer than he thinks.

Dalek Soul by Guy Adams

On the Dalek-occupied world of Mojox, a group of rebels is engaged in a futile fightback against the invaders – but at last they’ve found an ally, in the form of the mysterious Doctor. Elsewhere, however, the Daleks’ Chief Virologist is seeking to perfect a biological weapon to wipe out the Mojoxalli, once and for all.

Her name… is Nyssa.

Doctor Who - Alien Heart / Dalek Soul is available today for £12.99 on Download or £14.99 for the 2-CD set. Alternatively, you can subscribe to the main Doctor Who range in either six- or 12-story runs - not only do you get the releases at a discount, but you will also get subscriber exclusives such as an extended version of the CD extras as a download, a PDF of the script, and up to four specially-written Doctor Who - Subscriber Short Trips downloads. Any CD purchases from the main range unlock a download as a Big Finish exclusive and you can be listening within minutes.

The cover for July's Doctor Who - The High Price of Parking by John Dorney went online today. Join us next month for the second of our two two-parters with Doctor Who - Vortex Ice / Cortex Fire from writers Jonathan Morris and Ian Potter: