"It was scary to quit my day job," he says. "I wasn't sure I could make it. I said, 'Well, if it doesn't work out, I could go back in some shape or form.' I do remember thinking, 'I don't know if this will work out.' But I was really happy when I finally committed to it."

"Entertainment is so fickle," he says, shaking his head, "and you just don't know. But at the same time, it's very clarifying because knowing that no job lasts forever, it's a lot like life. Just enjoy it while you can. Make the most out of every job. So whether I'm doing something like 'Dr. Ken,' I want to enjoy every second of it. I want this to be as fulfilling as possible. And that's kind of how one should look at life.

"I'm not talking about MY day job, but when someone feels stuck, in a rut in their day job — even if you're making a good living; it's the same old crap every day. What's the joy in that? Do you come home just to be miserable and everything's really a depressing version of 'Groundhog Day?' So I'm spared of that," says Jeong.

"I think part of me craves stability, and part of me craves excitement. I'm just trying to have a balanced view of it. I think you're doing humanity a disservice if you're not doing what you love to do. It's bigger than that. I still keep in contact with patients and still have my license to practice. My wife's a doctor, and I think the last thing you want is a doctor to take care of you who doesn't want to do it."