Alison Brooks, a deaf caterer, uses her exceptional lip-reading skills to assist the police by interpreting conversations of a violent criminal gang, which helps unlock key parts of the investigation.

The five most popular story-related questions about Code of Silence, Series 1 (2025), excluding the overall plot and ending, are:

1. How does Alison Woods' deafness and lip-reading ability influence the investigation and her role in the story?
2. What is the nature of the relationship between Alison and Liam Barlow, the gang's newest recruit?
3. How does Alison balance her undercover work with her family struggles and personal life?
4. What are the main challenges and dangers Alison faces as she gets deeper into the criminal world?
5. How does the series portray the experience of a deaf protagonist within a crime drama setting?

These questions arise from the series' focus on Alison's unique skills and perspective, her complex interactions with suspects, and the personal and moral dilemmas she encounters during the investigation.