Back in the day, there was a Sixth Doctor TV story called Vengeance on Varos, which, among other things, introduced the character of Sil; a slimy, reptilian creature played with manic glee by Nabil Shaban. He proved popular enough that he was brought back in the second segment of Trial of a Time Lord. There were plans to bring him back for another story, but that never happened. Or at least, it never happened on TV Mission to Magnus is that story, and it features Sil, voiced by Shaban, back in all his epic hideousness. Everything we loved about him in the TV show he brings back to this audio, which I could easy see having aired on TV. Its one of the earliest of the Lost Stories range, and its easily one of the very best.