Broadcast: Saturday 10th April 2010
10:30am-11:00am BST (09:30 GMT) < > « »
BBC2 - Except Wales (Analogue) & Yorkshire

Featuring: Elisabeth Sladen, Daniel Anthony, Alexander Armstrong, Tommy Knight, Yasmin Paige, Anthony O'Donnell, Clare Thomas, Ronan Vibert

Sarah Jane has 40 minutes to stop Sontaran Commander Kaagh from destroying Earth using its orbiting satellites, while Chrissie finds out the truth about aliens from Alan - but will they be in time to save Maria?
Synopsis Source: Doctor Who Guide