Three new promotional images and an exclusive preview of the next episode of the Sarah Jane Adventures, a mini sketch that has been specially recorded to help raise money for Comic Relief, have recently appeared online. The preview is approximately twenty seconds long and as well as being available on the BBC's official website for the Sarah Jane Adventures, it can also be viewed below;

You can view the three new promotional images that have been released to help promote both Comic Relief and the mini episode here, here and here. We also now know that the Slitheen (highlight to reveal) will be appearing in the episode and that Ronnie Corbett will be playing an alien ambassador from outer space. The episode will air on BBC One tomorrow between 7pm and 8pm and it will be part of the official Comic Relief telethon.