TV Guide has the details on the February 12 and February 19 episodes of Grey's Anatomy, in which Private Practice characters Sam, Naomi, Addison and her brother Archer visit Seattle Grace after learning of Archer's serious brain condition.

Archer (Grant Show) first returns to Oceanside the previous episode, February 5. Looks like Addison and Mark will reprise their old ways - or at least flirt a bit in one episode.

Also, as reader Nikki points out, note the use of the term "fiance" below - are Meredith and Derek getting engaged? Will the proposal happen between now and February 12?

Check out the scan below for the details ...

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