Elisabeth Sladen, who plays Sarah Jane comments: "It's a fantastic script and I can't wait to work with another Doctor and hope Matt has fun with us. I've known Katy for ages and I am delighted to be working with her. I last met her in LA but this time we will be in Cardiff. LA was good but Cardiff is better."
Katy Manning, who recently returned to live in the UK again, adds: "Playing Jo Grant again is something I never really considered. I was gob-smacked when they told me and I am over the moon. What an incredible little treat. I come home and this is one of the first things that happens."
Executive producer Nikki Wilson says: "We are absolutely thrilled to be introducing Sarah Jane and the gang to both The Eleventh Doctor and Jo Grant, and to have a script penned by Russell T Davies is the icing on the cake!
"Viewers are in for a real treat, with an action-packed story full of Russell's usual wit and warmth, which takes the gang inside a secret base beneath Snowdon and introduces brand-new vulture aliens, the mysterious Shansheeth. All this, plus a trip to an alien planet – a first for The Sarah Jane Adventures."