BBC Christmas schedule: Doctor Who, Top Gear and a boy in a dress His friend, Lisa, persuades him to try on a dress she has created and he poses as her French penpal in a bid to wear the dress to school. Moss plays herself in a cameo role. Walliams has described The Boy In The Dress as "a funny and poignant story about what it is to be different. I hope it will make everyone who sees it, young and old, stop and think. When the book was published in 2008, he said: "The book isn't aimed at misunderstood young cross-dressers. Dennis isn't remotely confused about his sexuality - he's totally straight. Nor does he want to wear a dress all the time. It's a story about adult hypocrisy, and the injustice of being a child. He added: "I want everyone to identify with the character of Dennis. He's the lead character and a really lovely, sweet boy who has this unusual thing he wants to do. I want to communicate that this is a totally harmless, fun thing he is doing, and ultimately that difference is something to be celebrated, something to be embraced. Kennedy, 13, appeared in the 2011 Horrid Henry film and this is his first starring role. Other cast members include Jennifer Saunders, Meera Syal and Walliams himself. A scene from the Top Gear Christmas special, before the crew were hounded out of the country by angry locals BBC Two will no doubt score its highest rated show this Christmas with Top Gear's Argentina special. Jeremy Clarkson caused a diplomatic incident when he drove through the country in a Porsche bearing the number plate H982 FKL, interpreted as a goading reference to the 1982 Falklands conflict. Viewers will see the presenters and crew hounded out of the country in what the BBC is billing as "a climax that wasn't exactly the one that was expected." BBC Two will also broadcast a tribute programme to Rik Mayall, who died earlier this year.