Mysteries are there to be solved. Aren't they?

Jack has been working with the Shadow Doctor for a little while now. He thinks he might just be getting to grips with the Doc's unusual approach to helping with people's deep problems. Then, visiting the highly respected leader of a large Christian organisation, Jack sees his friend go on the attack. However, the encounter reveals secrets about the Doc's past that are beyond anything Jack could have imagined.
Perturbed, he makes a list of all his unanswered questions. Where does the Shadow Doctor's unusual name come from? Why is he so stubbornly reluctant to speak about faith in terms that normal churchgoers would understand? Why is Jack not allowed to simply enjoy a moment when God really seems to have spoken through him? And will the Doc finally describe the life-changing experience mentioned by Jack's gran in the letter she wrote to him shortly before her death? Most all, Jack is desperate to pin down just what the Shadow Doctor actually thinks and feels about God.

And there is one more issue that Jack feels particularly keenly. How will Doc respond to hearing that, having met a young lady named Aelwen, Jack is deeply in love for the very first time?