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An old war buddy catches up with Nolan at the same time a Castithan criminal with a history of violence enters the picture.

Kenya is kidnapped, while Rafe moves a step closer to learning the truth about his son's death.

Nolan and Datak clash over an ancient ritual, while the hunt for a killer is on.

The arrival of the mysterious Nolan and his charge Irisa to the town of Defiance marks a threat to the fragile peace that exists between the residents in the premiere of this futuristic drama, which is set in the year 2046, more than 30 years following a war between humans and aliens that left Earth forever changed.