The body of an old man is found floating in the Thames although the DNA of the corpse corresponds to an 18-year old friend of Josh and Ellie. Sarah Jane heads towards West Yorkshire in a bid to discover what killed the man, why someone is kidnapping homeless teenage boys and whether there is a link between that and the retreat of philanthropist Will Butley which hosts The Huang Ti Clinic. Sarah discovers that there is more to ancient Dark Sorcery than she may have otherwise believed.
Written By: Barry Letts
Directed By: Gary Russell
Elisabeth Sladen (Sarah Jane Smith); Jeremy James (Josh Townsend); Sadie Miller(Natalie Redfern); Caroline Burns-Cook (Claudia Coster); Juliet Warner (Ellie Martin); Mark Donovan (DI Morrisson); Moray Treadwell (Will Butley); Steven Wickham (Mr. Sharpe); Jane McFarlane (Nurse Jepson); Robert Curbishley (Read);Wendy Albiston (Meg Hawkins); Toby Longworth (Wong Chu); Maggie Stables(Mrs Lythe)