From a press Release:

Sarah Jane Smith is reunited with another of The Doctors former companions, Jo Grant (Katy Manning), plus the eleventh Doctor (Matt Smith), in the new series of The Sarah Jane Adventures this autumn.

Katy Manning, who recently returned to live in the UK, says Playing Jo Grant again is something I never really considered. I was gob-smacked when they told me and I am over the moon. What an incredible little treat. I come home and this is one of the first things that happens.

The team will be taken inside a secret base beneath Snowdon and meet a brand-new vulture aliens, the mysterious Shansheeths, plus a trip to an alien planet – a first for The Sarah Jane Adventures!