The BBC Press Office is has announced that David Tennant will be appearing in two episodes of the upcoming series of The Sarah Jane Adventures.
In an interview (see video below), departing Doctor Who producer Russel T. Davies described it as “not just a cameo appearance. It’s not just like he turns up at the end in the TARDIS… It’s a proper story where the Doctor gets involved… he meets Sarah Jane’s gang, the stakes are really high and… it’s like a treat for those who are missing Doctor Who on the screen.”