Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor examines treason plot evidence
S20E2
·
Arc of Infinity Part 2
To
Doctor uncovers spy device in Nyssa’s room
S20E2
·
Arc of Infinity Part 2
Why These Connect
The narrative assertion
"The Doctor's examination of the biodata printout in Nyssa's room leads directly to the revelation that a traitor has removed his biodata extract from the Matrix and planted a listening device in the TARDIS console room. This confirms the traitor’s existence and the systemic infiltration of Gallifreyan security."
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.