Martin Clunes Nicky Johnston Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Logo text Fox's midseason series Best Medicine is based on the beloved British show Doc Martin. The show's latest casting will make the connection even more concrete. Martin Clunes, who played the title character on Doc Martin, has signed on for a guest role in Best Medicine - though not as the British doctor he played for 10 seasons spanning almost 20 years. Instead, Clunes will play Dr. Robert Best, the father of lead character Dr. Martin Best (Josh Charles). Robert is an accomplished but headstrong gastroenterologist whose demeanor makes Martin's prickly bedside manner seem warm by comparison. He arrives in the New England town where Martin has moved after giving up his surgical career in Boston and puts everyone on edge, including his estranged sister and Martin's aunt (Annie Potts). "But underneath his snobby, stone-cold exterior," the character descripition reads, "Robert is hiding a few secrets of his own that could turn Martin's new life upside down, and force him to confront his past." Related Stories Business Fox Entertainment Takes Equity Stake in AI-Microdramas Company Holywater TV Fox Entertainment Studios and HarperCollins Ink a Both-Ways First-Look Deal The Best Medicine cast also includes Abigail Spencer, Josh Segarra, Cree, Didi Conn, Clea Lewis, Stephen Spinella, Jason Veasey, John DiMaggio, Carter Shimp and Cindy De La Cruz. Fox Entertainment studios produces Best Medicine. Liz Tuccillo executive produces with Ben Silverman, Rodney Ferrell and Howard T. Owens of Propagate Content and Doc Martin EPs Marc Crowdy and Philippa Braithwaite. Along with Doc Martin, Clunes' credits include the BBC's Men Behaving Badly, ITV's Manhunt (which streamed on Acorn TV in the U.S.) and a 2018 miniseries adaptation of Vanity Fair. He'll next be seen in Emerald Fennell's Wuthering Heights feature film. THR Newsletters Sign up for THR news straight to your inbox every day Subscribe Sign Up Live Feed M. Night Shyamalan Is Directing a Live-Action Magic 8 Ball TV Series Written by Brad Falchuk Kiera Knightley Keira Knightley Reacts to J.K. Rowling Boycott After Joining Harry Potter Project YouTube YouTube Takes MIPCOM: EMEA Chief Pedro Pina and BBC Studios' Jasmine Dawson Say It's All About "Feeding Fandom" Mipcom 2025 Resilience Earns Raucous Applause at MIPCOM's Women in Global Entertainment Power Lunch Live Feed 'Bridgerton' Season 4 Sets Two-Part Release Mipcom 2025 MIPCOM Deal Wrap: 'Sunny Nights,' 'A Party to Die For' Score Sales Live Feed M. Night Shyamalan Is Directing a Live-Action Magic 8 Ball TV Series Written by Brad Falchuk Kiera Knightley Keira Knightley Reacts to J.K. Rowling Boycott After Joining Harry Potter Project YouTube YouTube Takes MIPCOM: EMEA Chief Pedro Pina and BBC Studios' Jasmine Dawson Say It's All About "Feeding Fandom" Mipcom 2025 Resilience Earns Raucous Applause at MIPCOM's Women in Global Entertainment Power Lunch Live Feed 'Bridgerton' Season 4 Sets Two-Part Release Mipcom 2025 MIPCOM Deal Wrap: 'Sunny Nights,' 'A Party to Die For' Score Sales