Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Tegan exchange hard-won gratitude
S20E12
·
Mawdryn Undead Part 4
To
Turlough formally joins the Doctor’s crew
S20E12
·
Mawdryn Undead Part 4
Why These Connect
The narrative assertion
"The Doctor's moment of gratitude and farewell to Tegan (Act 3) directly leads to Turlough's request to join the TARDIS crew, marking a shift from conflict to alliance and character growth."
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.