The five most popular story-specific questions people ask about Reunion, Series 1, Episode 4, excluding questions about the overall plot and the ending, are:

1. How does the relationship between Brennan and Carly evolve in this episode?
2. What is revealed about Ray's involvement in the abuse and his motivations?
3. How does the episode portray the tension and atmosphere in the final scenes, especially in the country cottage?
4. What role does British Sign Language (BSL) and deaf culture play in the storytelling of this episode?
5. How does Brennan's character respond to the opportunity for revenge, and what does this reveal about his personality?

These questions arise from key story elements such as the complex character dynamics, the dark past involving abuse and cover-up, the intense and suspenseful final scenes, the unique use of BSL as a narrative device, and Brennan's moral choices, all of which are central to Episode 4's content.