'Parenthood' Season 4: Kristina's Cancer Storyline

NBC's "Parenthood" has seen its fair share of twists and turns, but Season 4 has thrown its biggest curve ball yet: Kristina (Monica Potter) has been diagnosed with breast cancer.

So how will the show's stars keep the season from becoming overwhelmingly sad?

“One of the things that I loved about my first conversation with Monica about it, was she said, ‘Look, I really want to find the humor in the situation, too. We don't want to get to a place where I'm crying all the time and that's all I'm doing,’" producer Jason Katims told Examiner.com.

"And I was so happy to hear that was her take on it, because to me the whole thing with going through something like this, that I've found, was that you go through it, but as you're going through it life goes on."

"Parenthood" isn't all Katims has on his plate these days. According to Deadline.com, the producer is hard at work developing an "About A Boy" TV series, based on Nick Hornby's novel and the 2002 movie starring Hugh Grant.

"Parenthood" airs on Tuesdays at 10 p.m. ET on NBC.

For more on Christina's cancer storyline, head over to examiner.com.