: Martin and Louisa head to London for a conference, but Martin remains distracted by anxieties back home, specifically worrying that the babysitter might be incompetent or worse.
: While the main plot occurs in London, Louisa is shocked by the sudden reappearance of her estranged father back in Portwenn, adding another layer of family tension to the episode. Why it's "Good Content" [S10E6] Return to Sender
: It explores Martin's social anxieties and Louisa's past, providing deeper insight into their dynamic outside the familiar setting of Portwenn. "Doc Martin" Return to Sender (TV Episode 2022) - IMDb : Martin and Louisa head to London for
: Louisa faces her own stress when she realizes that Sophie Trent , a woman from Martin's past who has recently divorced, is also attending the conference and seems intent on reconnecting with him. "Doc Martin" Return to Sender (TV Episode 2022)