There's a new drink taking the world by storm - Bubbleshock! Everyone's drinking it. When Maria's dragged along to the factory tour by her new friend, Kelsey - a girl with an opinion on everything - she's plunged into the sinister world of Bubbleshock and the mysterious Mrs Wormwood. There's something terrible behind the hype - something Sarah Jane's interested in too...

• BBC Cymru Wales
• BBC
• Elisabeth Sladen
• Samantha Bond
• Yasmin Paige
• Tommy Knight
• Alexander Armstrong
• John Leeson
• Porsha Lawrence-Mavour
• Jamie Davis