“On Call,” a cop show that marks Dick Wolf’s first-ever scripted streaming series, is also notable for the way it gender flips its central situation.

Set in the LA-adjacent Long Beach seaside community, “On Call” pairs rookie cop Alex Diaz (Brandon Larracuente, “The Good Doctor”) with troubled veteran Traci Harmon (Troian Bellisario, “Pretty Little Liars”).

What’s interesting in a series that has no interest in seeing any sexual tension in that patrol car, the two stars nevertheless had to do a “chemistry read” before being cast.

“I’m happy we got the chance to do that chemistry read,” Larracuente, 30, said in a joint Zoom interview. “Because after we booked it, I feel nothing was handed to us. We had to earn each and every scene. Each and every day came with this new set of challenges.”

How unusual is it — to have a man and a woman as series’ leads where there’s no romantic spark?

“That’s what’s so fantastic about this,” Bellisario, 39, said. “The writers were really conscious not to fall into that trope of, Are they? Are they not?  Will they? Won’t they?

“They don’t have the luxury of being family; they work together. The only difference? At their work, it’s life or death if they don’t trust each other and they don’t have each other’s backs.

“That is just an endlessly interesting conversation to mine,” she feels. “Because you have all of these incredible dynamics. How does a woman approach this? How does a man? How does somebody 12 years on the job approach this? How does somebody who’s fresh approach it?

“There’s so many more interesting things in service to our relationship. Without clouding it or muddying it with like, ‘Is there an attraction?’

“That was,” she concluded, “just such a gift. For them to literally take it off the table and make it much more of a protective mother and child trying to prove themselves in the world. That’s way more interesting.”

More than interesting, mind blowing actually, is the reveal that both Larracuente’s parents are ex-law enforcement.

“My dad, all my life, was always hinting at my playing a cop — and I just never saw it. Because I try to let life come to me. He was, ‘You played a doctor on TV? Like, what’s next?’

“And behold, this pretty surreal opportunity came. Because growing up, it was watching my parents go out there, not knowing if they were going to come home or not, every single day.

“Then one day I wear the uniform, but in a completely different way? That was mind blowing for me, a full circle moment.”

All 8 half-hour episodes of “On Call” are available to stream on Prime Video Jan. 9.