Created by former Doctor Who Executive Producer, Russell T Davies, this exciting action-adventure series follows the exploits of school friends Luke, Clyde and Rani, who team up with alien investigator Sarah Jane Smith and her trusty super-computer Mr. Smith to examine strange and mysterious events. The fourth series promises ever more thrills and spills. In two special episodes written by Russell T Davies, Sarah Jane is reunited with another of the Doctor's former companions, Jo Grant. They're joined by the Eleventh Doctor (Matt Smith) in an alien-busting adventure featuring brand-new vulture aliens, the mysterious Shansheeth and a trip to an alien planet. The series also promises fun with enemies old and new, including the terrors of the Nightmare Man and a dangerous journey back into history.