Doc Martin: Season 8, Episode 4

8 - 4: Faith

Having worked as missionaries in Kenya, Morwenna's parents, Jack and Tara Newcross, pay her a surprise visit, and are surprised by the relationship between her and Al. Morwenna is shocked to discover the real reason for her parents' return is that Tara has cancer. She has decided against treatment because of her faith. Both Morwenna and Martin think this is a foolish decision.