‘Dr. Quinn’s’ Jane Seymour, Joe Lando bring ‘sizzling’ chemistry to ‘Harry Wild’

More than three decades after they became one of television’s most beloved couples, Jane Seymour and Joe Lando are proving some chemistry never fades.

The former “Dr. Quinn, Medicine Woman” stars reunited on Season 5 of “Harry Wild,” and according to Seymour, it didn’t take long for everyone on set to notice the spark was still very much alive.

“Oh yeah, you know, that was the amazing thing,” Seymour told Fox News Digital when asked whether she immediately felt the chemistry return when Lando walked onto set.

JANE SEYMOUR EMBRACES 75TH BIRTHDAY WITH SWIMSUIT BEACH PHOTO AND MESSAGE OF GRATITUDE

“I told people, the powers that be, I said, ‘You don’t understand, Joe and I, when we act, whatever we’re playing, even if it isn’t a love scene, there is chemistry there.'”

Seymour said she warned producers ahead of time that reuniting the pair would create a familiar kind of magic. Then came the reaction that confirmed it.

“And they came to me after the first day. The director said, ‘Oh my God, the screen is sizzling,'” Seymour recalled. “And I said, ‘It just happens.’”

‘The director said, ‘Oh my God, the screen is sizzling.’ And I said, ‘It just happens.”

— Jane Seymour

The actress credits decades of friendship and collaboration for the effortless dynamic.

JANE SEYMOUR’S KEY TO STAYING FIT AT 74 WITHOUT STRICT DIET

“I mean, when we work together… well, we’ve known each other, we’ve worked together for 35 years.”

Lando agreed. “Yeah, 35 years,” he added.

JANE SEYMOUR, 75, SHARES HOW SHE APPROACHES AGING WITH VITALITY: ‘BEST I CAN BE’

For Seymour, the partnership is as effortless as a championship doubles team.

“It’s like playing tennis with the perfect partner, you know?” she said. “But we play off of each other. We’re usually completely ridiculously humorous. We have a lot of fun, and we both take it very seriously, but we know how to get a reaction out of one another, and it works.”

WATCH: JANE SEYMOUR TEASES ON-SCREEN ROMANCE WITH JOE LANDO IN ‘HARRY WILD’ SHAKEUP

The highly anticipated reunion comes as “Harry Wild” returns for its fifth season on Acorn TV, bringing bigger mysteries, higher stakes and a new character who may finally shake up Harry’s personal life.

Seymour, who stars as Harriet “Harry” Wild and serves as an executive producer, said the show’s success starts with its unconventional lead character.

JANE SEYMOUR SAYS SHE’S ‘NEVER ON A DIET,’ REVEALS SIMPLE ROUTINE THAT’S KEPT HER A SIZE 4 FOR DECADES

“Well, it’s just a great character,” Seymour said. “I think it’s very unusual to have a woman in her 70s and a sidekick who’s maybe almost 20 now… solving crimes.”

She also praised co-star Rohan Nedd, whose character Fergus has become a fan favorite.

“The chemistry between us is extraordinary, and I think that really helped,” Seymour said.

But this season, producers wanted to add another layer.

“We decided to add a little extra… you know, maybe Harry might want to have a romantic moment.”

JANE SEYMOUR REVEALS ‘WAKE-UP CALL’ THAT CHANGED EVERYTHING ABOUT HER HEALTH APPROACH

That led writers to create Pierce Kennedy, a brilliant state pathologist played by Lando. Pierce Kennedy is the new state pathologist introduced in Season 5.

“It was actually the writers’ idea, of bringing Joe in,” Seymour explained. “They wanted to have someone that was academically at the same level, who was a pathologist.”

Whether he can be trusted, however, remains another mystery.

WATCH: JANE SEYMOUR ON CHEMISTRY WITH JOE LANDO: ‘THE SCREEN IS SIZZLING’

“Well… I don’t think he’s a hero yet,” Lando teased. “We’re not quite sure about Pierce because he has something in his past that he’s trying to keep a secret from Harry.”

The role marks a departure for the actor, who spent years playing cowboys, action heroes and heartthrobs.

“He’s the most decorated, as far as intelligence, doctor I’ve ever played,” Lando said. “I’ve played lawyers. I’ve played lots of bad guys and things, but I’ve never had this kind of role before.”

JANE SEYMOUR SAYS FINDING LOVE IN HER 70S WITH FIANCE JOHN ZAMBETTI FEELS LIKE A ‘MIRACLE’

That comfort level comes from a friendship that has endured long after the cameras stopped rolling on “Dr. Quinn.”

When Fox News Digital asked how they’ve maintained such a lasting bond in Hollywood, Seymour reflected on their unique history together.

“Wow, I mean, that’s a really interesting question,” she said. “We worked together for seven years and we kind of fell for one another in the pilot, rather famously, for a brief time. So, we knew each other really, really well, better than on screen.”

MALIBU FIRES DROVE JANE SEYMOUR FROM HER HOME WITH BARELY MORE THAN THE CLOTHES ON HER BACK

The pair eventually realized they were better as friends than romantic partners.

“And then we realized that we were better off being friends and working together,” Seymour explained. “But I think… we’ve really kind of come together as friends after ‘Dr. Quinn,’ didn’t we?”

Lando echoed the same sentiment.

“Yeah, it took a few years after that,” he said. “I was in Canada for a while working on something, and when I came back, we just started hanging out.”

When asked what hasn’t changed about Seymour since their “Dr. Quinn” days, Lando didn’t hesitate.

“This inexhaustible flipping energy,” he said. “She just goes, goes and goes.”

Comparing Seymour to the Energizer Bunny, Lando recalled watching her work through grueling production days while pregnant with twins.

LIKE WHAT YOU’RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWS

“45, pregnant with twins. We’re doing 12-hour-plus days sometimes,” he said. “I’d start feeling myself getting a little worn, and I would look over at her… suck it up, get out there and do the job. And that hasn’t changed about her.”

Seymour’s explanation for her legendary stamina is simple.

“I know people keep asking me why, and I just say, because I love what I do,” she said. “I just do, you know, and then when I stop, I sleep.”

CLICK HERE TO DOWNLOAD THE FOX NEWS APP

For fans who spent years watching their romance unfold on “Dr. Quinn,” the reunion offers more than nostalgia.

AMC Global Media’s “Harry Wild” season 5 is available to stream exclusively on Acorn TV.