A revealing documentary following acclaimed Scottish artist Peter Howson as he undertakes the most ambitious commission of his career: a monumental religious painting for Glasgow’s St Andrew’s Cathedral. Over two turbulent years, the project becomes increasingly consuming, pushing Howson towards financial ruin and a severe mental breakdown as he battles perfectionism, faith and his own troubled state of mind
| Actor | Role |
|---|---|
 Peter CapaldiSelf - Narrator (Voice) | Self - Narrator (Voice) |
| PPeter HowsonSelf | Self |
 Steven BerkoffSelf | Self |
| SSandy MoffatSelf | Self |
| MMatthew FlowersSelf | Self |
| MMario ContiSelf (Archbishop of Glasgow) | Self (Archbishop of Glasgow) |