With the evidence complete, the Doctor learns that the Master has gained illicit access to the Matrix in his TARDIS. Glitz is now revealed to be the Master's associate and the 'secrets' to be information stolen from the Matrix.
The Valeyard admits his identity as a distillation of the dark side of the Doctor's nature, somewhere between his twelfth and thirteenth incarnations, out to take control over his remaining lives.
DVD EXTRAS
Commentary: (Part 13 only) Eric Saward. (Part 14) Colin Baker, Tony Selby, Chris Clough, Pip & Jane Baker
