Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor reveals Ping-Cho’s TARDIS exposure
S1E17
·
The Wall of Lies
To
Susan and Ping-Cho plot Tegana’s exposure
S1E17
·
The Wall of Lies
Why These Connect
The narrative assertion
"The the Doctor reveals his discomfort with Ping-Cho because she knows about the key, Ping-Cho and Susan discuss Tegana's influence and the need to expose him."
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.