Cast of Best Medicine: Actors, Characters and Roles

The cast of Best Medicine is led by Josh Charles as Dr. Martin Best, alongside Abigail Spencer, Josh Segarra, Cree, and Annie Potts. The FOX medical comedy-drama follows a brilliant former Boston surgeon whose move to the fictional Maine village of Port Wenn forces him to navigate patients, family, romance, and a community that will not let him remain distant.

Cast of Best Medicine: Main Actors

• Josh Charles as Dr. Martin Best – A highly skilled former surgeon who becomes Port Wenn’s general practitioner after a blood phobia interrupts his surgical career.
• Abigail Spencer as Louisa Gavin – A schoolteacher and Martin’s most significant personal connection in town.
• Josh Segarra as Sheriff Mark Mylow – Port Wenn’s sheriff and Louisa’s former fiancé.
• Cree as Elaine Denton – Martin’s administrative assistant, whose plans extend beyond the doctor’s office.
• Annie Potts as Aunt Sarah – Martin’s aunt, a lobsterwoman and his strongest family connection to Port Wenn.

The main ensemble creates the series’ central contrast. Martin brings exceptional clinical knowledge to Port Wenn. Still, Louisa, Mark, Elaine and Sarah each reveal that medical expertise does not automatically translate into emotional intelligence, professional tact or a sense of belonging.

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Supporting Characters and Guest Stars

Port Wenn residents

• Stephen Spinella as Greg Garrison – Co-owner of The Salty Breeze restaurant.
• Jason Veasey as George Brady – Greg’s husband and co-owner of The Salty Breeze.
• John DiMaggio as Bert Large – A local handyman and Al’s father.
• Carter Shimp as Al Large – Bert’s son and a younger member of the Port Wenn community.
• Clea Lewis as Sally Mylow – The town pharmacist and Mark Mylow’s mother.
• Didi Conn as Geneva Potter – A Port Wenn councilwoman.
• Patch Darragh as Glendon Ross – Martin’s former childhood bully.
• Michael Potts as Gilbert Carlisle – A recurring patient in Martin’s practice.
• Cindy De La Cruz as Jeannie – A schoolteacher in Louisa’s professional circle.
• Wattson as Copernicus – The stray dog who becomes part of Martin’s day-to-day life.

Family and guest appearances

• Martin Clunes as Dr. Robert Best – Martin’s father and a physician.
• Judith Ivey as Vanessa Best – Martin’s mother.
• Eliza Coupe – A late-season guest performer.

The supporting cast makes Port Wenn function as more than a backdrop. The residents have connected jobs, family ties and social routines, so Martin’s professional encounters often become personal complications outside the clinic.

Why the Ensemble Works

Martin Best is the show’s outsider expert: medically authoritative, emotionally guarded and uncomfortable with the unpredictable demands of close relationships. The rest of the cast is structured around the pressure points he cannot solve through diagnosis alone.

• Louisa challenges Martin’s emotional withdrawal.
• Mark represents local confidence and shared history.
• Elaine understands the people Martin frequently misunderstands.
• Aunt Sarah connects Martin to family, memory and Port Wenn’s independent culture.
• Greg, George, Bert, Al and Sally make the town feel socially connected rather than conveniently populated.

This arrangement gives the comedy-drama its balance. Martin may be the lead, but the series does not depend on one character changing overnight; his development unfolds through repeated encounters with people who expect him to participate in community life.

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Character relationships explained

• Martin and Louisa: Romantic tension shaped by attraction, argument and differing expectations of emotional honesty.
• Martin and Aunt Sarah: A family bond that keeps Martin tied to Port Wenn even when he tries to retreat into work.
• Louisa and Mark: A past engagement that gives Martin’s arrival a personal consequence.
• Martin and Elaine: An employer-assistant relationship that exposes Martin’s limitations with patients and colleagues.
• Elaine and Al: A younger romantic storyline that expands the series beyond Martin and Louisa.
• Greg and George: Married restaurant owners whose business acts as a gathering point for the community.
• Martin and Copernicus: A comic relationship that illustrates Martin’s inability to control every part of his new life.

How Best Medicine Reinterprets Doc Martin

Best Medicine is an American adaptation of the British series Doc Martin. Developed by Liz Tuccillo from the format created by Dominic Minghella, it retains the premise of a gifted but socially difficult doctor in a coastal community while changing the setting, character histories, and relationship dynamics for Maine.

• Dr. Martin Best parallels Dr. Martin Ellingham, but Best arrives from a Boston surgical career.
• Louisa Gavin fills the role associated with Louisa Glasson, with a revised name and personal history.
• Aunt Sarah is comparable to Aunt Joan Norton, though Sarah is a Maine lobsterwoman rather than a Cornish farmer.
• Elaine Denton adapts the role of Elaine Denham, with different ambitions and a more contemporary storyline.
• Sheriff Mark Mylow has similarities to PC Joe Penhale, but his past with Louisa gives him a more direct place in the central relationship.
• Sally Mylow echoes pharmacist Sally Tishell, while becoming part of the Mylow family.
• Bert and Al Large retain their names but operate within a different community and setting.

The adaptation is most effective when treated as a new interpretation rather than a replica. It preserves the appeal of the original premise while building its own version of Martin’s family history, career setback, and coastal community.

Martin Clunes’s appearance as Dr. Robert Best is the clearest bridge between the shows. Clunes played Dr. Martin Ellingham in Doc Martin, but appears here as Martin Best’s father rather than reprising his earlier character.

Where to Watch

In the United States, Best Medicine airs on FOX and streams on Hulu. Season 1, which contains 13 episodes, is also available on Netflix in the United States.

Availability outside the United States varies by region and licensing agreement. Viewers should check local streaming catalogs, television listings and official platform guides for current access.

FOX has renewed Best Medicine for a 12-episode second season. The established principal cast includes Josh Charles, Abigail Spencer, Josh Segarra, Annie Potts and Cree.

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