The synopsis for the fifth story in the third series of The Sarah Jane Adventures has been released. Mona Lisa's Revenge makes up episode nine and ten of the series and it sees the Mona Lisa strangely coming to live to set her brother free from an ancient prision.

Part One
Strange forces bring the Mona Lisa to life, as the adventure series starring Elisabeth Sladen continues.

Clyde's proudest day turns into a nightmare when he discovers that fine art can be dangerous and, when a school trip descends into disaster, the gang find themselves trapped without Sarah Jane's help, as the awesome abomination stirs.

Part Two
Luke and Rani investigate the myth of the dreaded abomination, as the two-part drama concludes. With Sarah Jane trapped and beyond help, everything now depends upon Clyde.

Mona Lisa vows to release her terrifying brother from his age-old prison, but only Clyde has the key

The first part of Mona Lisa's Revenge will air on the 12th November (Thursday), and the second part of the story will be aired on 13th November (Friday). You can watch both episodes on these dates at 4.35pm on BBC One and BBC HD.