In Episode 2, Alison hides a secret that adds complexity to her deepening relationship with Daniel in 1989 Sheffield, though the exact nature of the secret is not explicitly detailed in the available summaries.

Daniel and Alison's relationship deepens through the exchange of mixtapes, showing the early stages of their connection and emotional bond in 1989 Sheffield.

The mixtapes serve as a key medium through which Daniel and Alison communicate and deepen their relationship, symbolizing their emotional connection and the nostalgia of the era.

The episode reveals family drama and emotional complications, including Alison's secret and the tension around whether Daniel and Alison will get the closure they need, as well as Alison's relationship with Peter which may be strained.

Daniel is confronted with the decision of whether to accept a book deal, and he also navigates a complicated personal space with Kat, indicating tension in his current relationships.