Covering Patrick Dempsey’s racing career was good fun when he entered the sport in the late 2000s. To many of his fans, Dempsey was a lead actor in “Grey’s Anatomy,” one of the most popular TV shows at the time, but there was a different side to Dempsey as he embarked on a secondary career in the former Grand Am Rolex Series sports car championship.

Grand Am was renowned for its great racing, but it wasn’t burdened with immense popularity, and that meant Dempsey — despite serving as the top name at each event — wasn’t constantly mobbed by fans. It would change a few years later as he moved up to the American Le Mans Series and then went on to race on the sport’s biggest stage at the 24 Hours of Le Mans, but in those early Grand Am days, Dempsey could leave the celebrity behind and be seen and treated as just another racer by his teammates and rivals.

The relative simplicity and purity of those times would be gradually surrendered as full-time racing in the ALMS and FIA World Endurance Championship — in teams he either owned or co-owned — dominated Dempsey’s life with constant domestic and international travel, all while filling the rest of his time with TV and movie projects.

The untenable pace and demands came to a head after the 2015 season; having achieved most of his dreams and goals in racing, Dempsey decided to step away from the sport and focus on his family and first career.

And like most racers, the passion that led him to climb inside the cockpit wouldn’t remain extinguished. Signed to play racing legend Piero Taruffi in Michael Mann’s film Ferrari, it was the driving that led Dempsey back to active competition in 2024 with American ace Patrick Long in the Porsche Endurance Challenge, which is the subject of the new documentary “Destined to drive: Patrick Dempsey’s return to racing,” which airs Sunday on FOX Sports 1 after the NASCAR Cup race.

MARSHALL PRUETT: With the release of the new documentary chronicling your return to the driver’s seat, it’s been interesting to see fans posting reactions to it, saying, “I got into sports car racing because of Patrick Dempsey!” That must be an interesting thing to experience.

PATRICK DEMPSEY: It’s fascinating, and I think it’s really cool because we’ve seen this resurgence — you’ve seen Drive to Survive turn everything upside down for motorsport and give it a platform where people are like, “Oh, wait, there’s humanity behind this. It’s not just some cars running around.”

People are getting to know the personalities. I wasn’t sure what the reaction would be, but it’s nice that it’s positive.

PRUETT: My father was an amateur racer so I grew up with this as my passion and it became my profession since my teens. And I love that is also a part of your arc in racing, even though you didn’t get into it actively until later in life. You had already achieved incredible success in your profession, but you discovered racing, and you loved it, and you drove to considerable success behind the wheel. Then you stepped away for a bit only to come back and say, “OK, this damn thing is in my veins.” Tell me about that side, because I think it resonates with anybody who chases a passion in life.

DEMPSEY: My father was a really big racing fan, too. He was a team owner at one point. You know, living in the South — short tr ack, he’d have a car, he had a bar, and then he would advertise his bar with his car. Some of my earliest memories were listening to the Indy 500 in the front seat of the station wagon because they would delay the telecast in those days, back in the ’70s, so I would listen to the race. And then we’d all gather around and watch the 500 together. That was at the height of the 500 where it was the race of the year.