Guest Stars Jesse Williams as Dr. Jackson Avery Sarah Drew as Dr. April Kepner Maurice Irvin as Nurse Tyler Christian Robert Baker as Dr. Charles Percy Nora Zehetner as Dr. Reed Adamson Mitch Pileggi as Larry Jennings Erinn Hayes as Cathy Becker Bill Fagerbakke as Roy Mackinaw Mark Daugherty as Evan Ron Roggé as Fire Captain Andrew Miller as Danny Becker Saundra McClain as Lawyer Jakob Miller as Danny Becker John Bradford as Danny's Dad Arlene Santana as Nurse