Terrall's Keys

The keys, also found in Terrall’s pockets, become the means by which Toby gains unauthorized access to the house. Their theft is a direct result of Toby’s opportunism and the chaos of the confrontation. The keys symbolize the breaking of boundaries and the escalation of Toby’s crimes, as they enable his fatal entry into the house. Their significance lies in their role as a catalyst for the next phase of the story, where Toby’s actions lead to his demise at the hands of a Dalek.

Terrall’s keys, stolen by Toby earlier, enable his infiltration of the laboratory. They represent his desperation and opportunism, as well as the fragility of his plan. The keys are the tool that allows him to access the laboratory but ultimately lead to his demise, underscoring the irony of his greed. Their use here ties directly to Terrall’s earlier confrontation and Toby’s betrayal, creating a chain of cause and effect that ends in tragedy.