Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor establishing covert UNIT contact via radio in the sewers (Part 7) sets up the Doctor's later use of the radio to coordinate with the Brigadier during the confrontation with Vaughn in Part 8."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
In Part 7, the Doctor radios UNIT from the sewers, establishing a direct communication link with the Brigadier. In Part 8, this same channel is used during the crisis in Vaughn's office, where the Doctor invokes the Brigadier by name ('Brigadier, this is the Doctor'), signaling continuity in his trust of UNIT command despite tactical disagreements. This link reinforces the Doctor's role as a strategist who leans on communication even as he acts independently.
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.