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 Bill Fagerbakke as Roy Mackinaw Erinn Hayes as Cathy Becker Andrew Miller as Danny Becker Ron Roggé as Fire Captain Mark Daugherty as Evan Saundra McClain as Lawyer Jakob Miller as Danny Becker John Bradford as Danny's Dad Arlene Santana as Nurse