"OCD is built on magical beliefs that don't make much sense in the real world," says Cosmo - and he should know, because he has had the disorder since he was a child. In this program, Cosmo reaches out to others with OCD to more deeply understand the nature of his own condition: Nellie, who fears becoming someone else and uses repeating rituals to keep those fears at bay; Margaret, a hoarder and a hand-washer; and Mark, who must check every single thing in his house when he leaves and returns. In addition, two psychologists and a researcher shed light on diagnosis of OCD subtypes and OCD management through exposure-and-response therapy and cognitive therapy. A gentle inquiry into a thoroughly disrupting condition, Touch Wood is by turns unsettling and inspiring.