Ep 4. The Portwenn Effect

In this episode of Doc Martin, entitled "The Portwenn Effect," we find Dr. Martin Ellingham (portrayed by Martin Clunes) experiencing a bit of a moral dilemma. After learning that many of his patients are beginning to turn to alternative treatments, such as acupuncture and homeopathy, Doc Martin begins to question his own methods and consider whether or not he should incorporate these alternative practices into his own medical approach.

At the same time, Doc Martin is also dealing with the aftermath of a break-in at his home, which has left him feeling vulnerable and anxious. His relationship with local schoolteacher Louisa (played by Caroline Catz) continues to be tense, as the two struggle to find common ground and overcome their differences.

As always, the small town of Portwenn is full of colorful characters, each with their own problems and concerns. In this episode, we meet a man who believes he is allergic to electricity, and a woman who is upset because her dog is being taken away. We also see some more lighthearted moments, such as when Doc Martin accidentally gets high on marijuana.

Overall, "The Portwenn Effect" is a thought-provoking and emotionally engaging episode of Doc Martin, with plenty of laughs and heartwarming moments mixed in. It's a great example of why this show has become so beloved by audiences around the world, and an excellent introduction to the charming and quirky world of Portwenn.