Josh Charles is stepping into Best Medicine Season 2 as Parker, a professional monitor sent to keep tabs on Dr. Martin Best as the series returns on September 22. Parker is not just another new face in Port Wenn. He is the person assigned to watch Martin’s medical compliance, and he will appear in multiple episodes.
That makes Parker more than a procedural obstacle for Martin. He is described as a charming, friendly man who comes into Martin’s space while the doctor is already under pressure over the board learning that Elaine had been drawing blood for him because of the blood phobia he has kept from most people. Martin is the kind of doctor who, by his own account, is capable of doing the work himself. Charles said he is frustrated to have someone looking over his shoulder and ashamed of how things got to this point. The monitor storyline is built to sit right on top of that discomfort.
Rodney Ferrell called it “a juicy, big arc of the season,” and the description fits the setup. Ferrell said the monitor is in Martin’s personal space, eating the food in his house, constantly watching him and making noise while he tries to work. He also said there is someone evaluating Martin’s role as a doctor through the first period of episodes, which means the pressure is not brief or symbolic. It is built into the season’s early stretch, where Martin has to keep functioning while being observed.
The complication for Martin is that Parker does not stay in the lane of oversight. He also begins having sparks with Louisa, which folds the season’s romantic thread into the compliance story. That matters because Best Medicine already ended its first season with Martin and Louisa in a push-pull dynamic. In the finale, Martin was on the edge of confessing his feelings when he overheard Louisa speaking with Mark, who offered to have a baby with her as friends. Martin then turned to Eden, who is also Louisa’s fertility doctor. Season 2 does not reset that triangle so much as complicate it with a new person who is supposed to be there for Martin’s supervision.
Ferrell said there will be two monitors, and that the first one gives Martin all kinds of problems before finally going away. A new monitor comes in after that, which means Parker is part of a sequence rather than a one-off appearance. For Martin, the immediate problem is daily scrutiny. For Louisa, it is that the man assigned to watch him may also pull her attention. By the time Best Medicine Season 2 opens, the show is not just asking whether Martin can get through the board’s watchful eye. It is asking how long he can keep his private life from becoming part of the case file.

