Episode One

Captain Jack returns as the Torchwood team reunites to fight a rogue Time Agent. The mysterious Captain John Hart (James Marsters, Spike from Buffy the Vampire Slayer) is determined to wreak havoc and needs to find something hidden on Earth. But with Gwen's life in danger and cluster bombs scattered across the city, whose side is Jack on?

Episode Two 

When a burglary turns into a slaughter, Torchwood suspect alien involvement. But when the investigation escalates into a city-wide assault, Jack realizes that the whole planet is in danger.

Episode Three

Toshiko falls for a handsome soldier, trapped out of his time, who unwittingly holds the key to saving the world. In an old hospital haunted by ghosts from 1918, a crisis foreseen by Torchwood 90 years ago is about to reach its climax. Time zones are colliding, and, with life-or-death decisions to be made, will Torchwood be able to stop an explosive end for Cardiff?

Episode Four

Rhys discovers the truth about Torchwood and becomes part of the team as they investigate a mysterious alien meat supply. With Rhys in increasing danger, Gwen is under pressure like never before. Will Rhys go too far? Will Jack ask too much of him? And can Torchwood save the alien from being used as cheap meat?