Bubble Shock! is a new drink that is taking the world by storm. It's strangely addictive and everyone's drinking it. Sarah Jane is so fascinated by the phenomenon that she is almost oblivious to the arrival of her new neighbour, 13-year-old Maria Jackson, a young girl starting a new life with her father.
It is Maria, Luke and Clyde's first day at their new school and something is not quite right. The food keeps going off, there is a funny smell in the air and the new technology block is hiding some dark secrets. The friends soon make a shocking discovery: the Slitheen (an evil alien race) have disguised themselves as teachers.
Under attack from the monstrous Slitheen child, Maria, Luke and Clyde escape, thanks to some deodorant and Sarah Jane's sonic lipstick. Back in her attic, Sarah Jane's super-computer Mr Smith reveals the aliens' evil plan to drain Earth of its energy. But as a power blackout spreads across the globe, Mr Smith goes out of action.
Sarah Jane and her young friends investigate reports of a ghostly nun which is haunting the local old folks' residential home. And when one of the elderly residents entrusts Luke with a mysterious alien talisman, it becomes clear there is even more to the story than meets the eye.
Maria's dad Alan has been turned to stone. The alien talisman is now in the possession of the Gorgon and her evil nuns, and they are preparing to open the portal to their world. Can Sarah Jane and her young friends free Alan from his stony state and prevent the nuns from unleashing more deadly aliens on the Earth?
Sarah Jane and Maria investigate the mysterious disappearance of local boy Lance Metcalf, and soon discover that a number of children have gone missing across the country. Remarkably, the disappearances all occurred during freak storms and in cities that are home to a laser tag game called Combat 3000.
Elisabeth Sladen
Sarah Jane Smith
Tommy Knight
Luke Smith
Daniel Anthony
Clyde Langer
Alexander Armstrong
Mr. Smith
Juliet Cowan
Chrissie Jackson