Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Penley Refuses to Return with Garrett
S5E13
·
The Ice Warriors Part 3
To
Doctor Deciphers the Omega Factor
S5E13
·
The Ice Warriors Part 3
Why These Connect
The narrative assertion
"Garrett obtains the Omega Factor notes from Penley, which directly enables the Doctor to complete the ioniser equation."
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.