Nanny McPhee In this wickedly charming tale, Nanny McPhee (Emma Thompson) enters the household of Mr. Brown (Colin Firth) and attempts to tame his seven naughty children. As she takes control, they begin to notice that their misbehaving has magical and startling consequences. Nanny McPhee Returns When Nanny McPhee appears at the farmhouse door of a busy young mother (Maggie Gyllenhaal), she discovers that her children are in a household war with their spoiled city cousins. Nanny McPhee uses her magic to show the children five valuable lessons including how to get along.