Arizona (Jessica Capshaw) will finally meet Callie's (Sara Ramirez) new girlfriend in the upcoming episode of the long-running ABC series "Grey's Anatomy."

In "Guess Who's Coming to Dinner?," Cartermatt reports that the blonde head of Pediatric Surgery is dreading the day her ex-wife will bring her new beau and introduce her to the doctors of the Grey Sloan Memorial Hospital. It looks like that time has come as Maggie (Kelly McCreary), Amelia (Caterina Scorsone), and Meredith (Ellen Pompeo) are hosting a large dinner party. Will Callie use the opportunity to parade Arizona's replacement in front of everybody?

Meanwhile, Maggie will be called to the hospital due to an emergency. As the sisters' dinner party has no cook, April (Sarah Drew) will step up to do job. In reality, she is avoiding Jackson (Jesse Williams), who seems intent on pursuing her. Will her kitchen duties save her from the unwanted attention of the doctor or will she be cornered between the chopping board and the stove?

Last episode, Maggie was mortified when she woke up and learned that she spent the night with Andrew (Giacomo Gianniotti), Grey Sloan's hot new intern. Although they were careful to keep the wild night a secret, Andrew bumped into Amelia while attempting to leave the house quietly. Her sister then lost no time to tell the scandal to Meredith, who assured Maggie that she was not the only one to sleep around in the hospital.

Elsewhere, Meredith coached the new interns on how to tell people that they have lost a loved one. This was after she saw how Owen (Kevin McKidd) failed to instructed the newbies on how emotionally crippling it was to hear such traumatic news. She relayed how it was when she turned from being a wife to a widow in just a snap and how painful it was for her.

"Grey's Anatomy" airs Thursdays at 8 p.m. EST on ABC.