Doc McStuffins (2012)

S2E22 The Doctor Will See You Now

In the doctor's office waiting room, Dolly, Morton, Carl Chug a Chug, and Fabio are puzzled about why the kids at the clinic aren't interested in playing with them. To find out more, they get a check-up from Doc, who is unexpectedly referred to as Dottie for the first time in the series.