from http://news.bbc.co.uk/1/hi/entertainment/7076705.stm
Doctor faces Sontarans once again
The new series will be screened in the UK next spring
A group of Doctor Who's enemies - the Sontarans - will be revived, 35
years after first appearing in the BBC drama.
The warriors will feature in an episode which will also mark the
return of Freema Agyeman as Martha Jones.
She will run into the Doctor's new companion - Donna Noble, played by
Catherine Tate - for the first time.
....
Martha will be back halfway through the series, once actress Agyeman
has appeared in three episodes of Doctor Who spin-off Torchwood.
"Martha Jones returns in a fantastic storyline and the fans will get
to see her in a whole new light," Agyeman promised.
