The BBC has just confirmed that series two of The Sarah Jane Adventures will kick off at 4.35m on 29 September on BBC. Episode two will then be shown at 5.15pm on CBBC. This pattern will continue for the rest of the series.

The official descriptions of the first four episodes are as follows (spoiler warning):

The Last Sontaran (highlight to read)

By Phil Ford, Directed By Joss Agnew

Part One - Reports of strange lights around the Tycho Radio Telescope lead Sarah Jane, Luke, Clyde and Maria into a terrifying forest encounter – and Sarah Jane comes face to face with her oldest enemy. Meanwhile Maria wrestles with a huge decision when her dad is offered a new job in America.

Part Two - Sarah Jane and the gang have only 40 minutes to save Earth as Sontaran Commander Kaagh plots to bring the world's orbiting satellites crashing down on nuclear installations across the world. And Maria's Mum finally gets to the truth from Alan – but will they be in time to save Maria?

The Day Of The Clown

By Phil Ford, Directed By Michael Kerrigan

Part One - New girl in Bannerman Road, Rani Chandra, is being haunted by a sinister clown – does it have anything to do with the local children that have gone missing? When Clyde's friend disappears the trail leads them to a strange circus museum – and the legend of the Pied Piper!

Part Two - Sarah Jane's investigation into Spellman and Odd Bob the Clown takes her to a meteorite at the Pharos Institute. But Spellman's plot to make all of Park Vale's pupils vanish leads Sarah Jane into a confrontation with her own childhood fears in a bid to save Luke.