Part TwoSeries Episode Number: 13
World Premiere: Mon 29 Sep 2008 - 5:15pm BST [CBBC] (United Kingdom)
Running Time: 27 minutes
Recorded on Wed 21 May 2008 in Upper Boat Studios at these locations
Archive State: SD
BBC Genome Project: see entry
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?