Doc Martin star Martin Clunes is making his debut as Josh Charles' father on the Fox remake Best Medicine. In Us Weekly's exclusive clip from the Tuesday, March 3, episode of the new series, Robert (Clunes) and wife Vanessa (Judith Ivey) have an awkward breakfast with Aunt Sarah (Annie Potts) and their son, Martin (Charles). "I can't imagine you both growing up in Port Wenn," Martin tells his parents. Vanessa clarifies that certain traditions such as the Blueberry Festival were after their time, adding, "After we left, we never looked back.