Planet E9874 supports a developing civilisation known as the Tarl. The peaceful, technologically advanced Locoyuns are helping the Tarl develop redimentary technology. What could be more innocent than that? When the Doctor, Leela and K9 arrive, they find the delicate balance in the relationship between the two cultures reaching an unexpected crisis point. The spears are flying and the threat of all-out war is in the air. The Doctor must use all his guile to tread a careful path with Tarl leader Ergu, while Leela and K9 discover an ancient power of unimaginable strength which threatens to tear the minds out of its victims. This story revisits spooky aliens The Exxilons from 1974's Death to the Daleks adventure. The fourth series in a Big Finish range which is hugely popular with fans of the classic TV series Doctor Who. As well as Doctor Who, Louise Jameson has been seen in Bergerac, Eastenders and many more UK shows. Cast: Tom Baker (The Doctor), Louise Jameson (Leela), John Leeson (K9), Daisy Dunlop (Trexa), Jacqueline King (Calura), Hugh Ross (Gethal).