Following the huge success of The Secret World of LEGO, we once again go behind the scenes at LEGO to see how staff gear up for the holiday season, create new lines for Christmas and manage the multi-language customer call centre at the busiest time of year. We follow the construction of a spectacular Lego train in central London and meet the Addis family, who have built a huge LEGO sculpture in their Cambridgeshire living room every December for the last twenty years.