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It's not particularly weird that actor Rachel Brosnahan appeared on "Grey's Anatomy," largely because the show has been running for so long that quite a lot of people have dropped by for a visit at the fictional Seattle hospital, Grey Sloan Memorial, that serves as the setting for Shonda Rhimes' popular series. Still, Brosnahan's appearance on the popular ABC medical drama was a little while ago, so if you're a little hazy, I'll refresh your memory about her role during the show's ninth season in 2013.

First things first. Right now, Brosnahan is a newly minted movie star thanks to her leading turn as journalist Lois Lane , girlfriend of Clark Kent (David Corenswet), in James Gunn's massively successful take on "Superman." Gun

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