“Downton Abbey” stars Joanne Froggatt (Anna Bates), Lesley Nicol (Mrs. Patmore), Matt Milne (Alfred Nugent), Nigel Harman (Mr. Green) and Robert Bathurst (Sir Anthony Strallan) are among the guest-star voice cast in a special episode of Disney Junior’s Emmy-nominated animated series “Doc McStuffins.” Titled “Let the Nightingale Sing,” the episode premieres SUNDAY, NOVEMBER 2 (8:30-9:00 a.m., ET/PT) on Disney Channel in the U.S. and in December on Disney Junior UK. In the extended-length episode, Doc and the toys magically travel back to 19th century England where they meet a young Florence Nightingale (voiced by Joanne Froggatt) and help her realize her dream of becoming a nurse.