Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Tegan confronts the Doctor over Nyssa
S20E13
·
Terminus Part 1
To
Nyssa forced through TARDIS door
S20E13
·
Terminus Part 1
Why These Connect
The narrative assertion
"The Doctor’s urgency in sending Nyssa through the emergency door to save her from the escalating malfunction forces their physical separation, a decision that shapes the entire second act’s focus on reunion and survival."
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.