The Doctor responds to a distress call from his granddaughter, Susan, taking him to the Diamond Array: a huge multidimensional space station. Once there, his instability increases, as the Fourth and Eighth Doctors discover the Array's terrible purpose.
Meanwhile, River Song has made a deadly alliance to try to save her husband. And the truth about the Doctor's degeneration will finally be revealed.
***PLEASE NOTE: this Special Edition release can now only be purchased as part of a Download bundle. Click on the bundle button above for more details. If you wish to purchase this release as a stand-alone story, you can find the standard edition here.***
