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

As Trueman begins to take over the world's population through their star signs, Clyde takes a big gamble to help Sarah Jane, Luke and Rani into the astrologer's inner circle, as the children's drama series, produced by Russell T Davies, continues.

But when Sarah Jane's plan to defeat Trueman fails, who will be Earth's last hope to overcome the Ancient Lights?

Secrets of the Stars part two will broadcast on the 27th of October at 5.15pm on CBBC and on the 3rd of November at 4.35pm on BBC One.