Reeling from the impact of another tragedy, Cat is presented with a dark choice to make, depending on whether she seeks the truth, or revenge.

The story returns to the days leading up to Mary's death and the truth is finally revealed. But will it satisfy Cat?

In the aftermath of the funeral, Cat finds herself on the receiving end of Jim's apparent mercy.

It's time for the twins' first communion and the entire Hogan family is gathering for the first time since last year's dramatic events. There is tense mood within the family and Jim must fight to prevent Paul from breaking down.

Cat Hogan returns to West Meath upon her mother's sudden death - she has an accident at home and died (or was it an accident?). Blood is about old secrets, older betrayals, mind games and the lies family tell each other.

Cat struggles to get her suspicions taken seriously after her mother's mysterious death. She tracks down an old friend from her past who may be able to shed light on the present.

Fiona tries to recall what has happened in recent weeks, while being questioned about the discovery of her husband's dead body. A look back shows Jim and Paul witnessing an abuse by gang leader Kian.

Season finale. Fiona is interrogated again by Dez and she tells the police how shortly before Paul's death she received a bad message about her health, and how that information in combination with Kian's pressure became too much for Paul to handle.