The picture above was made by me.
The BBC Press Office has now added the synopsis for The Sarah Jane Adventures Secrets of the Stars part one. The episode will follow Day of the Clown part two. Secrets of the Stars guest stars Russ Abbott as Martin Trueman. You can see the synopsis below;

Sarah Jane and the gang embark on another exciting new adventure this week as the children's drama series, produced by Russell T Davies, continues.

Astrologer Martin Trueman causes a stir with his uncanny insights and predictions. While Sarah Jane doesn't believe in astrology, she does believe that all is not as it seems with Trueman. Around her, people are falling under Trueman's sinister spell and even Mr Smith doesn't understand what's going on.

Secrets of the Stars part one will broadcast on the 20th of October on CBBC and on the 27th of October on BBC One. In other news BBC One's showing of The Sarah Jane Adventures The Last Sontaran part two got overnight ratings of 0.6 million viewers.