Long before they met that tornado of music and joy that is Pinkamena Diane Pie, Carrot Cake and Cup Cake were merely a couple of newly-weds that opened a bakery on their hometown.
Life was pretty dull for them until the day they opened their door to meet a curios and crazy stallion who just barged in to become their assistant.
A small stand-alone story based on The Lodger episode of Doctor Who series 5.
Don´t think too much of it. Is not connected to any story aside from having the Doctor on it.