Here are a couple of spoilers on who else we can expect to appear the 12th season of this season's Grey's Anatomy in addition to the original gang!
[AARON] Male, All Ethnicities, mid to late 30s, opera singer, overweight, gay. ACTOR MUST BE ABLE TO SING 16 BARS ACCAPELLA. Patient in the hospital sptv050769. Guest Star
[JEFF] Male, All Ethnicities, mid to late 30s, husband of AARON. He is a teacher and a supportive husband. Guest Star