in 2000, grey played oldrich novy in the film "dancer in the dark" and had recurring television roles on "buffy the vampire slayer" (as the evil reptilian demon doc, 2001), "oz" (as lemuel idzik, 2003) and "alias" (as "another mr. sloane", 2005). he played a wealthy, paroled ex-convict on "" (episode "", 2003). grey also originated the role of the wizard of oz in the hit broadway musical "wicked". he also appeared on the shows "house" and "brothers & sisters" (2007), on the latter of which he played the role of dr. bar-shalom, sarah and joe's marriage counselor. he appeared as izzie's high school teacher who needs treatment for dementia in "grey's anatomy" (2009).