Broadcast: Monday 21st February 2011
2:20pm-2:50pm GMT < > « »
CBBC

Featuring: Daniel Anthony, Alexander Armstrong

Sarah Jane Smith and the gang open the Alien Files - the ultimate guide to everything you could possibly need to know when facing hostile aliens. Clyde has the lowdown on the all-controlling Berserkers and the alien truth behind the world's most famous painting - the Mona Lisa.