The former network talk show host is one of the producers behind a new documentary on a Ontario boy who made good - his former bandleader. 

It's called ‘Say Hello to Our Good Friend Paul Shaffer,' the line Letterman used to introduce his companion on his long running CBS talk show. And the doc traces his roots from small town up north to bright lights down south - with a stop in Toronto along the way. 

"[It] will follow Letterman’s bandleader from his musical roots in Thunder Bay, Ontario, to his break as musical director on the celebrated 1972 Toronto production of Godspell. That led to success working on Broadway, Saturday Night Live and his longtime partnership with Letterman."
 
It's still not clear where this will run once it's finally finished, but my bet is on a streaming service. And I can't help but wonder if the Toronto International Film Fest will have this on its list, as well. 

David Letterman to Exec Produce Paul Shaffer Feature Documentary