The BBC Press Office has confirmed that David Tennant is to appear as the Tenth Doctor in the forthcoming third series of spin-off The Sarah Jane Adventures, due to be shown on CBBC and BBC One this autumn. This will once again reunite the Doctor with former companion Sarah Jane Smith, played by Elisabeth Sladen.
The release also confirms that the series will again be twelve episodes long, and that it will feature an appearance from Doctor Who race the Judoon. Executive producer Russell T Davies is quoted of saying of Tennant's appearance in the programme: "Viewers thought they may have to wait until November for the next full episode of Doctor Who, but this is an extra special treat. And it's not just a cameo from David – this is a full-on appearance for The Doctor as he and Sarah Jane face their biggest threat ever."
Sladen is also quoted in the release, saying: "When I heard the news that David was going to be joining us I was absolutely over the moon. Not only has it made my day but it will also make the viewers' day."
For UK internet users, the Children's BBC website has made available a video interview with Davies where he discusses the Doctor's appearance in the series, which he says will take place across episodes five and six. The series is due to start broadcasting in September. BBC News also carries the video interview with Davies.