Nanny McPhee Returns (also known as Nanny McPhee and the Big Bang) is a delightful 2010 family fantasy comedy that brings back Emma Thompson's wonderfully stern yet magical governess. Set against the backdrop of World War II, the film follows Isabel Green (Maggie Gyllenhaal), a mother struggling to manage her country farm and three children while her husband is away at war. Her challenges multiply when two spoiled city cousins arrive, creating chaos that only a magical intervention can solve.

Enter Nanny McPhee (Emma Thompson), who appears with her unique brand of transformative magic. She teaches the five unruly children five important lessons, each causing her own disfigured appearance to improve. The film's charm lies in its blend of physical comedy, heartfelt moments, and imaginative fantasy sequences. Director Susanna White creates a visually engaging world that balances the grim realities of wartime with the whimsical magic of Nanny McPhee's interventions.

Emma Thompson, who also wrote the screenplay, delivers a perfectly measured performance that is both authoritative and warm. Maggie Gyllenhaal brings genuine emotional weight to her role as the overwhelmed mother, while the young cast members provide energetic and funny performances. The film's production design and costumes beautifully evoke the 1940s English countryside.

Viewers should watch Nanny McPhee Returns for its positive messages about responsibility, cooperation, and family bonds, all delivered with humor and magic. It's an ideal film for family viewing that entertains both children and adults with its clever storytelling and memorable characters. The magical transformations and comedic set pieces make it a thoroughly enjoyable experience that celebrates the power of good behavior and imagination.