I found this so moving and so fun.  What starts out as an intriguing alternate ending to the Trial of the Time Lord storyline, soon turns into an epic alt-universe adventure starring Mel as she confronts the Valeyard, whose attempts to meddle in the timeline ultimately lead to reality unravelling around him.  The Valeyard doesn't feel like the villain of this story, more like this being trapped in this horrible paradox he cannot escape from.  It's dark, surreal, and intimately interesting.  Compared to a lot of these other early Unbound stories, it and Deadline are a lot closer to what I expected.  I don't need slightly darker Doctor Who stories, but I definitely could use weird, reality-breaking, mind-bending, creative content like what I got out of He Jests at Scars.

The performers also enhance this one quite a bit.  The alternate Doctors and casting used in other Unbound stories is alright, but getting Bonnie Langford to basically carry the main plot forward was a huge asset to this audio.  She brings so much to the role and it really shows just how much the show originally squandered this companion's potential.  Maichael Jayston's return to the Valeyard role was also extremely memorable.  He's so good at the end playing this pitiable, broken figure.  He's a man tearing down everything around him just trying to survive and exist.  It's extremely compelling stuff, from my perspective.