Sandra Oh

Grey's Anatomy's Cristina and Owen have seen tough times: A quickie marriage, bouts of PTSD, an abortion, Owen's omission about Henry. It all reached the breaking point last week in a devastating fight that, unfortunately for the couple, most of Seattle Grace overheard.

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It may seem like Cristina (Sandra Oh) and Owen (Kevin McKidd) are moments away from divorce, but Sandra Oh tells TVGuide.com that they will make a real effort to mend the relationship starting Feb. 16, when the couple spends the entire episode with a therapist. "If you have ever been to couples therapy it's really, really challenging," Oh says, adding that she hopes the Owen-Cristina explosion does not spell the end of their marriage. "Every marriage has to go to a brink," she says. "Both of them are deeply hurt for their various reasons."

"You see a marriage in peril and we take our time exploring that quite honestly," Oh continues. "I'm extremely pleased with the storyline because a lot of times people get together, and break up or whatever, and it's fast. The writers are really taking their time to see when people are at loggerheads, and both sides of the argument can be understood. That's where it gets really, really tricky."

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The tension between the couple will also begin to affect Cristina's other relationships. Uncharacteristically, Cristina won't even turn to Meredith (Ellen Pompeo) for comfort.

Says Pompeo: "Cristina doesn't want her help. She's dealing with it solo and pushing Meredith away. Certainly, it's going to get worse before it gets better."

Check out a sneak peek of this week's Grey's Anatomy, which airs Thursday at 9/8c on ABC.