The BBC has released a short teaser for the forthcoming special episode of The Sarah Jane Adventures due to be shown as part of Red Nose Day 2009.
The charity telethon, organised by Comic Relief, will be shown on BBC One this Friday. The charity aims to raise money to help poor, vulnerable and disadvantaged people throughout the world's poorest countries as well as in the UK.
The show begins at 7pm UK time and the first hour will be part hosted by David Tennant. This hour will feature the special episode of Sarah Jane staringElisabeth Sladen and guest star Ronnie Corbett.
The episode is written by Gareth Roberts and Clayton Hickman and also stars Tommy Knight, Daniel Anthonyand Anjli Mohindra.
The video may not be available outside the United Kingdom.
The official Red Nose Day YouTube site contains a video on the making of the Sarah Jane Adventures episode.
Other Doctor Who related events for Red Nose Day include Doctor Whoogle, a Google custom search site which is sending its revenue to Comic Relief and Children in Need.
The previous Comic Relief special of Doctor Who, The Curse of Fatal Death, is now available on the UK iTunes site, with most of the charge going to Comic Relief. The story, written by new show runner Steven Moffat, was first shown as part of Red Nose Day 1999. It stars Rowan Atkinson, Richard E. Grant, Jim Broadbent, Hugh Grant andJoanna Lumley all as the Doctor.