Insomnia follows career driven Emma Averill whose life takes an unexpected turn. Just weeks shy of her 40th birthday, Emma finds herself ensnared in a web of sleeplessness, echoing her mother's own past struggles. But as the past resurfaces, so do haunting doubts and fears. With her mother's sudden hospitalisation, the return of her estranged sister, and an unnerving sense of being watched, Emma is thrust into a realm where truth is not what it seems... the past never sleeps.
As her 40th birthday approaches Emma stops sleeping. She realises she is repeating the same unsettling behaviour as her mother, who had a psychotic break on her own 40th. Is she turning into the very monster she has spent a lifetime trying to forget?
After their mother unexpectedly dies, Emma and Phoebe are shocked to learn her death is suspicious. Reeling from recent events, and with worsening insomnia, Emma is forced to come clean to her husband Robert about her past.
As Emma's life continues to unravel, her unsettling nighttime behaviour escalates so she decides to investigate what's happening to her. It becomes apparent that Emma may pose a danger to her own family which has devastating consequences.
Emma seeks solace in a new friend while Phoebe replaces her sister in the family home. As Emma digs deeper into the past, a forgotten childhood memory shines a light on her relationship with Phoebe, causing her to doubt her sister's intentions.
As Emma comes under the spotlight, she becomes increasingly convinced of her sister's treachery. Before she can get answers to a newly emerging memory, tragedy strikes and Emma begins to mistrust herself.
Realising her home has been infiltrated by a wolf in sheep's clothing, and her family is in danger, Emma races to save them. Can she prevent a shocking vengeance against her family? Or will history repeat itself?
Complete episode guide for Insomnia with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
This episode guide is organized by seasons, making it easy to track your viewing progress or find specific episodes. Use the episode information to plan your binge-watching sessions or catch up on missed episodes.