Convicted child killer Oswald Danes is executed for his crimes and when he miraculously survives his fate a series of events is set in place that forces CIA Agent Rex Matheson to investigate a global event. His investigation leads him from America to Wales and an old defunct British Institute - Torchwood.

As the Torchwood team is reunited, Jack realizes he's the most vulnerable man on Earth. A flight to the United States turns into a desperate battle for survival.

Torchwood goes on the run and finds a new enemy, but as they launch a raid on PhiCorp headquarters, Jack must confront the mysterious Oswald Danes.

Torchwood relocates to LA to sneak into PhiCorp's headquarters to find some useful information, unaware that their mission has been compromised. Elsewhere, Oswald and Jilly face a new adversary in Ellis Hartley Monroe, who is using the Miracle Day for her own agenda.

Torchwood goes undercover and discovers the terrible truth behind the Miracle. The enemy is closing in, and death is about to make a shocking return.

With Gwen, Rex and Esther trapped on both sides of the Atlantic, it's a race against time as Jack goes straight to the heart of the conspiracy.

Gwen must fight to protect her family and takes a terrifying journey, covering both miles and decades, as the long history of the Miracle is revealed.

Jack faces a showdown with a man he thought was long since dead, while Rex takes extreme action to prevent the collapse of society.

With the whole world in recession, a defeated Torchwood team take their last chance and make a deal with the devil.

As the Torchwood team launch a final, desperate mission against the seemingly undefeatable Three Families, they realize it may come down to the ultimate sacrifice.