S9E5 - Worse than Murder: 5. A Sense of Evil

After weeks of dead ends, police finally have a breakthrough in Muriel McKay's kidnapping case. A suspicious blue Volvo leads them to Rooks Farm in rural Hertfordshire. As they raid the property, they find mounting evidence implicating brothers Arthur and Nizamodeen Hosein. But there's still no sign of Muriel herself.

As detectives interrogate the brothers, a disturbing picture emerges of their backgrounds and possible motives. Meanwhile, the search of the sprawling farmland intensifies. Police are now certain they won't find Muriel alive, but can they find enough evidence to bring a murder charge without a body? The...