Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor and Leela's narrow escape from the unseen creature in the sewers (beat_f772139401fdf222) directly leads to their discussion about the inefficacy of ordinary weapons and the dismissive nature of official channels (e.g., Sanitary Inspector) in addressing this threat (beat_818d0a3debb0f219). This establishes the Doctor's need to take unconventional action."
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.