This Doctor Who Unbound has the "what if" starting point of what if The Valeyard won at the end of Trial of a Time Lord? Big Finish uses a couple of their own regulars - Coordinator Vansell (Anthony Keetch) and Ellie Martin (Juliet Warner) from the Sarah Jane Smith series. The story revolves around how much The Valeyard is or is not The Doctor. Like The Doctor, he has nothing but contempt for the Time Lords. Like The Doctor, he seems to need a traveling companion (Ellie in this case). And, like The Doctor he feels compelled to meddle. Where The Valeyard differs is that he wants to undo all The Doctor's achievements, which The Valeyard regards as mistakes, collect all the powerful artifacts and weapons, and then remake the universe to fit some ideal that he does not really himself full understand. The problem is that undoing these events starts undoing both the entire web of time and The Doctor's entire timeline. The Valeyard is actually erasing himself from time, and thus becomes desperate to try to "fix" the problem with even more heavy-handed interference that ends up making the problem worse. Into this chaos, Vansell has sent Mel either to reason with The Valeyard and get The Doctor back, or to assassinate The Valeyard. Unfortunately for Mel, The Valeyard erases the Time Lords, so there is no going back for her. Michael Jayston portrays The Valeyard excellently. He is a character who cannot control most of his impulses, but is intelligent enough to know that what he is doing is wrong. Bonnie Langford does really well as a weary, jaded Mel who has left all her young enthusiasm behind and is now just dedicated to getting a job done. The story itself is told by jumping around in time, so it is a bit difficult to piece together. Also, writer Gary Russell has indulged the "what is reality" idea just a bit too much, especially toward the end. The story does provide the listener with a new way to see the virtues of The Doctor.