Finally we have some news about this
All three two-part episodes from the fifth series of the ‘Doctor Who’ spin-off, created by the award-winning writer, Russell T. Davies.
The programme follows the adventures of one of the Doctor’s most famous former companions, investigative journalist Sarah Jane Smith (Elisabeth Sladen), as she faces all manner of alien life-forms and restores Earth’s cosmic balance with the help of her young assistants Clyde (Daniel Anthony), Luke (Tommy Knight) and Rani (Anjli Mohindra). Episodes are: ‘Sky’, ‘The Curse of Clyde Langer’ and ‘The Man Who Never Was’.
Released on February 6th 2012.