The new Director of Homeland Security reunites the team when a nuclear powered Russian satellite is knocked out of orbit and must be diverted before it detonates over Southern California.
Still picking up the pieces after the death of Denis and the cover up that followed, Val Ahern’s world is rocked once again when a stranger turns up on her doorstep. The stranger introduces himself as Finn - Denis’ estranged son, and his existence is an unwelcome surprise for the family.