<P> The doctors at Grey Sloan Memorial must get used to the fact that Dr. Cristina Yang ( Sandra Oh ) is now in Switzerland , but they find it difficult to like her new replacement , Dr. Maggie Pierce ( Kelly McCreary ) . She tries making friends with the doctors , but the one she 's really interested in learning more about is her half - sister , Dr. Meredith Grey ( Ellen Pompeo ) . Upon hearing Maggie 's news , Meredith does n't believe her . Trying to prove her wrong , Meredith pores over her mother 's journals to see if there might have been any evidence of truth . What she finds is that the pieces fit , and that she and Maggie are in fact half - sisters . Not too keen on the fact that she has a sister whom she did n't know about until now , Dr. Derek Shepherd ( Patrick Dempsey ) uses his love for his big family to draw Meredith and Maggie together . </P>
<P> The doctors at Grey Sloan Memorial must get used to the fact that Dr. Cristina Yang ( Sandra Oh ) is now in Switzerland , but they find it difficult to like her new replacement , Dr. Maggie Pierce ( Kelly McCreary ) . She tries making friends with the doctors , but the one she 's really interested in learning more about is her half - sister , Dr. Meredith Grey ( Ellen Pompeo ) . Upon hearing Maggie 's news , Meredith does n't believe her . Trying to prove her wrong , Meredith pores over her mother 's journals to see if there might have been any evidence of truth . What she finds is that the pieces fit , and that she and Maggie are in fact half - sisters . Not too keen on the fact that she has a sister whom she did n't know about until now , Dr. Derek Shepherd ( Patrick Dempsey ) uses his love for his big family to draw Meredith and Maggie together . </P>
where did cristina yang go in season 11
where did cristina yang go in season 11
Switzerland
Switzerland