The Sarah Jane Adventures - Season 5 Episode 6

Harrison captures Sarah Jane and her children,explaining that the Skullions, who operate the hologram of the non-existent Serf, are slaves whom he has bought from an alien planet. He aims to use the hologram to hypnotise people into buying the Serf Board, thus making him very rich. However Sarah Jane uses Mr. Smith to beam down a spaceship which frees the Skullions and returns them home whilst Sky and Luke take over Serf's controls to foil Harrison's plans.