I’m glad to see that despite the sad loss of Elisabeth Sladen there remains a certain amount of Sarah Jane material for me to absorb, even before the BBC decide what to do with the already filmed material for the fifth series. This is a cracking good yarn, told (like all the SJA audios) by Sladen as SJS in the first person, about an alien menace which controls people by persuading them to download it. That basically tells you all you need to know; a neat little parable for our times, with decent character time for both Sarah and Luke (less so for Clyde and Rani), nicely produced and generally satisfactory.