"I’ve been thinking about projects left unfinished," writes Rebecca Stott. " I’ve got the pages of two unfinished novels on my hard-drive, and a pile of sewing projects, seams pinned, pins rusting, in my sewing basket."

With the help of Leonardo da Vinci, "a notorious non-finisher," Rebecca ponders the meaning of our imperfect and incomplete projects.

Producer: Adele Armstrong