Children's entertainment series. Dave Chapman presents an undercover prank adventure involving mess, mayhem and full-on anarchy in a family's home. The kids think they are taking part in a programme called Mega Nanny - what they don't know is that Mega Nanny is their dad in disguise. Dressed in state-of-the-art movie make-up, a silly wig and women's clothes, Undercover Dad must spend two days undetected while completing a series of messy challenges, getting to know his kids better and winning them a pile of prizes. Dave brings the Nan Van to Hampton, where football-mad dad Gary Wilson undertakes the most challenging mission of his life. Will kids Kate and Laura warm to the ever-so odd and mysterious Mega Nanny? Or will they bust Dad beneath his rubbery disguise? More importantly, will Dad agree to break his boring house rules to win the prizes? Will he see things from his kids' point of view? Be prepared for extreme fun, extreme emotions, extremely close shaves and extreme cream pie action.