Kate Walsh is going back where it all began.

The Private Practice star, whose character played a huge role in the second and third seasons of Grey's Anatomy, is headed back to Seattle Grace in a spring episode.

TV Line suggests this may be an ominous sign for Callie's baby, as Addison will be summoned to Seattle March 31 for the purpose of helping out with a medical crisis.

Calzonasloan's child seems the likely case.

Addison and Mark last season, during Eric Dane's baby-related crossover.

The good news, at least according to what we've gathered, is that the baby won't be lost like others on Grey's Anatomy. So don't expect a miscarriage this time. Phew.

Then again, just because there's no miscarriage doesn't mean there won't be complications (or tragedy) once the little guy/girl is born. Hopefully not, but it's possible.

For now, we don't know much else about Addison’s latest trip up the coast ... and we can only imagine her reaction upon learning Mark's role in this unusual situation.

Excited to see her? How do you see it playing out? Comment below!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.