<P> The character is presented as highly professional , to the point of being a `` workaholic '' . She is notably hard on Resident Cristina Yang ( Sandra Oh ) , admitting that Cristina reminds her of herself as a student . Despite her intentions to keep away from relationships , she becomes romantically involved with orthopedic surgeon Callie Torres ( Sara Ramirez ) . The storyline was praised for its realistic portrayal of a developing same - sex relationship between two women , although consultants from the Gay & Lesbian Alliance Against Defamation expressed some concerns over what they deemed the somewhat exploitative talk of a threesome between Hahn , Torres and Mark Sloan . Hahn was written out of Grey 's Anatomy in November 2008 , with Smith commenting that the decision originated with the ABC network rather than with series creator Shonda Rhimes . </P>
<P> The character is presented as highly professional , to the point of being a `` workaholic '' . She is notably hard on Resident Cristina Yang ( Sandra Oh ) , admitting that Cristina reminds her of herself as a student . Despite her intentions to keep away from relationships , she becomes romantically involved with orthopedic surgeon Callie Torres ( Sara Ramirez ) . The storyline was praised for its realistic portrayal of a developing same - sex relationship between two women , although consultants from the Gay & Lesbian Alliance Against Defamation expressed some concerns over what they deemed the somewhat exploitative talk of a threesome between Hahn , Torres and Mark Sloan . Hahn was written out of Grey 's Anatomy in November 2008 , with Smith commenting that the decision originated with the ABC network rather than with series creator Shonda Rhimes . </P>
when does dr. hahn leave grey 's anatomy
when does dr. hahn leave grey 's anatomy
November 2008
November 2008