New: Lady Whitworth (Rebecca Front)

Meet the Mom: Reverend Osbourne Whitworth May Suck the Toes of Prostitutes, but This Season, You’ll Meet the Woman Who Suckled Him in His Infancy: Lady Whitworth. That’s Right, Even Ossie Has a Mother, and Once You Meet the Ghastly Woman, You Will Understand All.

New: Monk Adderley (Max Bennett)

More Adder Than Monk: Poldark’s Newest Villain—Ally to George, Antagonist to Ross—Is a Dangerous Mix of Charm and Smarm. He’s an Infamous Dueler and a Notorious Rake, and His Indolent Attitude Toward His Mp Seat Makes Him a Natural Nemesis for Our Noble Hero. And, He Gets Some of the Best—Albeit Creepiest—Lines. Stay Tuned!

Recast: Geoffrey Charles (Louis Davison)

Smells Like Teen Spirit: a Chip off the Old Francis Poldark Block, Geoffrey Charles Is Older but Not Wiser, Dabbling in Some of London Society’s Less Wholesome Activities Like Drinking and Gambling. Will He Continue to Dabble in Our Favorite of His Activities, Ie Trolling a Certain George Warleggan? Tune in to Find out!

Remember: Rosina Hoblyn (Amelia Clarkson)

It’s Time to Brush up on Some of Poldark’s Lesser-Seen Characters Who May or May Not Be Instrumental in Season 4’S Drama. Starting off the Trip Down Memory Lane Is Cornish Rose Rosina Hoblyn, She of the “Lipsy Leg. ” When Last Seen in Season 2, Rosina Had a Wee Crush on Doctor Dwight Who, Back in His Bachelor Days, Could Rob a Corpse, Cure Scurvy, and Fix a Torn Acl All in a Day’s Work. Rosina’s Boorish Father Jacka Is a Fearsome Tyrant…Is There Hope That She Might Find a Man Worthy of Her Sweet Nature?

Remember: Rowella Chenowyth (Esme Coy)

Artless and Innocent on the Outside, Morwenna’s Scheming Seductress of a Sister, When Last We Saw Her, Had Extracted £500 from Ossie Keep Quiet About Her Pregnancy. and a Very Convenient Pregnancy, Indeed! Blackmail Complete, She Is Free to Keep Her Shoes on and Marry Her Red-Headed Librarian.

Remember: Sir Francis Bassett (John Hopkins) / Lord Falmouth (James Wilby)

These Dueling Cornwall Powerbrokers Are on the Opposite Side of Every Issue. in a Sitcom, They’d Be Roommates! but in Poldark, Sir Francis Basset Lives in Tahiti Tehidy. There, He Advocates for 18Th Century Social Justice and Attempted to Anoint Ross as His Agent of Change. When That Didn’t Work Out, He Settled for George Warleggan as His Candidate for Truro’s Mp.

Plus: More Tom Harry, Emma Tregirls…And Verity!

George’s Thug, Tholly’s Daughter, and Everybody’s Bff Will All Return in Season 4!

New Characters & More

By Alexander Ross

• Oct 8, 2026 • 5 min read

Direct Answer • Key Takeaway

Stop Gazing Yearningly out at the Sea from Your Cliff-Top, and Focus! You Have New Villains to Meet, a New Actor Replacing a Beloved Character, and Minor Characters Who May or May Not Be Instrumental in Season 4’S Drama to Revisit. So Without Further Ado, Ready Your Steed and Make Haste; After All, Poldark Season 4 Premieres on Sunday, September 30 at 9/8C! #Poldarkpbs

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.

Tags: poldark s4 new and returning characters