The five most popular questions about the story content of Code of Silence, Series 1, Episode 2, excluding overall plot and ending, are:

1. How does Alison's lipreading help the police uncover the gang's plans?
2. What dangerous choices does Alison make that bring her closer to the gang?
3. What is the nature of Alison's relationship with Liam Barlow and how does it affect the investigation?
4. How do the police react when they discover Alison's secret meetings with Liam?
5. What are the tensions and conflicts between Liam, Alison, and her ex, Eithan, in this episode?

These questions focus on Alison's role in the investigation, her personal connections to suspects, and the resulting complications within the story.