Guest Stars Kelly McCreary as Dr. Margaret "Maggie" Pierce Jason George as Dr. Ben Warren Kate Burton as Dr. Ellis Grey Geena Davis as Dr. Nicole Herman Sally Pressman as Young Ellis Grey Libe Barer as Monica McKeever Megan Gallagher as Mrs. Oldroyd Christopher Redman as Chris Matthew Van Oss as David Oldroyd Co Starring Cynthia Youngblood as ER Nurse Curtis Walker as Medivac Guy Dyana Liu as Nurse Aria Lyric Leabu as Young Meredith Danny Jacobs as Doctor Ian Chen as Luca Peterson Courtney Cunningham as Woman Emma Shannon as Lily Michelle Noh as Sharon Peterson