The LEGO Minifigure Series, also known as Collectable Minifigures, was introduced in 2010 and features bling bags of a random LEGO minifigure, each being an original character with new designs, clothing and facial expressions, and most contain previously unseen accessories. Most subthemes contains characters based on movies, sports, history, and popular culture and there are a number of subthemes that are based on licensed products such as The Simpsons, DC heroes, Harry Potter and numerous others.