Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Tegan refuses Mawdryn control
S20E11
·
Mawdryn Undead Part 3
To
Doctor discovers lost companions gone
S20E11
·
Mawdryn Undead Part 3
Why These Connect
The narrative assertion
"Nyssa's action of setting the Tardis in motion despite Mawdryn's instructions (beat_1a46b39351b28675) leads to the Doctor and companions realizing the necessity to prevent the two Brigadiers from meeting (beat_ad9914137ef6de7b), driving the plot forward in the final act."
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.