The doctors at Balham Park Surgery treat patients with heart-related concerns, including Gerry, who sees Nurse Sara Moloney for a post-heart operation check-up. Since suffering a heart attack a month ago, he has become a teetotal vegan who walks for an hour each day. Meanwhile, Dr Chris Pearce speaks to Graham, who wants to ensure that he does not have the same rare genetic heart condition as his father, and Dr Clemence Mitchell advises Emily, who experiences heart palpitations when she gets a panic attack