In episode 3, 'One Of Them Is Lying,' Charlotte and Mel begin to uncover secrets about Jess's past, which contribute to rising tensions during a group dinner, revealing hidden aspects of her history that affect the ongoing investigation and family dynamics.

The investigation continues to deepen in episode 3, with cracks forming among the characters and shocking discoveries being made that escalate the drama and suspicion surrounding the unexplained head injury of baby Betsy.

As the investigation intensifies in episode 3, Jess faces increasing isolation and pressure, with her mental health deteriorating under the weight of guilt and suspicion. The family and social circles begin to fracture, highlighting the fragility of reputations and the strain on relationships.

Charlotte and Mel actively investigate Jess's past and the circumstances surrounding baby Betsy's injury, uncovering secrets that heighten tensions and contribute to the unraveling of the family’s facade during episode 3.

Frankie is shown carrying a heavy secret related to Betsey's accident, manipulated by an adult to believe he is to blame. His anxiety and nightmares worsen as the investigation continues, illustrating the emotional toll and complexity of children caught in adult crises.