|Photo Credit: ABC/Mitchell Haaseth|
In "Guess Who's Coming to Dinner?" Maggie ditches her cooking duties to rush to the hospital in the midst of the sisters' dinner party. Meanwhile, April steps in to help cook as an attempt to avoid Jackson, and Arizona nervously waits to find out more about Callie's new girlfriend.
In the sneak peek video below, as Callie proudly introduces her new girlfriend Penny to everyone, Meredith is desperately trying to hide how upset she is. She rushes upstairs to be alone, because coming face-to-face with Penny, the resident who treated Derek the night he died, has triggered an avalanche of flashbacks to that terrible night.
Grey's Anatomy stars Ellen Pompeo as Meredith Grey, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens Jr. as Richard Webber, Sara Ramirez as Callie Torres, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Jo Wilson, Jerrika Hinton as Stephanie Edwards, Kelly McCreary as Maggie Pierce and Jason George as Ben Warren.