The Doctor's trial continues. The Valeyard's next piece of evidence for the prosecution concerns the Doctor's recent trip to Thoros Beta. Though originally investigating arms dealing, the Doctor and Peri become embroiled in their old enemy Sil's alarming neurological experiments...
During a lively meeting with staff - chaired by Union Rep Charlie and Andrew Ponting, Duffy calls for a demonstration outside a cinema, which is showing 'naughty nurse' films. A law student, Mark Richards, is brought in after convulsing in a library. Baz tells him he has epilepsy, but he denies it and discharges himself. Charlie, sees him outside and gives him a lift, he takes him to breakfast. He advises Mark, who is afraid of fitting in a lawyer's court. A pregnant 15 year old, Nuala, is brought in after being knocked down with her bike, by a lorry. She has head injuries and a fractured arm. But the team are more worried by the fact she is a runaway, and where she will go after the hospital discharges her.