A third theatrical trailer has been released for the much-anticipated Batman Begins sequel, The Dark Knight, featuring Heath Ledger in one of his last performances. Heath’s Joker promises to be chilling and formidable and this latest trailer really showcases his character. The Dark Knight is out in the US on July 18 and is likely to be one of the summer’s biggest blockbusters.

Here’s the trailer from YouTube. You can watch it in higher quality on WhySoSerious.com (That’s the direct link, which I couldn’t find from the main page on their site. Thanks to the National Enquirer for linking this.)

In related news, Toys “R” Us can’t keep up with the extremely high demand for toy Joker dolls. An action figure based on his character in the Dark Knight is a big seller for the chain, and they can’t keep them stocked on the shelves. The NY Post reports that people are buying them as collectors items and selling the $9.99 dolls along with other figures from the series for $50 and up on eBay. The Post anticipated that this would happen, and quoted a toy expert in February who said that the dolls were sure to become collectors items due to Heath’s untimely death.

Heath’s family has said that they approve of action figures being released of his character, because he was very proud of his role in the film and would have wanted the figures to be released.