Police Constable Gwen Cooper comes across the mysterious organization known as Torchwood. While investigating their world, she finds technology and methods she never imagined.

Torchwood must stop a sex addicted alien as it leaves a trail of gruesome deaths in its wake.

After Gwen Cooper recovers an alien device from Sean Harris, the device seemingly takes her back in time to the 1940s where she sees a young boy, alone on a railway platform.

There's a dark secret in the basement of the Hub. Even Jack is unaware of it, but Ianto knows. And he'll go to any lengths, sacrifice anything and anyone, to protect what's down there.

Jasmine is a withdrawn but intelligent child whose new 'friends' exploit her suppressed anger, and while investigating this, Jack encounters elemental enemies from his past that are determined to harm those closest to him.

In the countryside north of Cardiff, the Torchwood team investigates the disappearance of 17 people in the last few months. No bodies have been found and the police haven't a clue as to what may have happened to them.

The team is asked to analyze a recently discovered 18th century corpse with a hole in its chest. Meanwhile, a mysterious charismatic woman seduces Tosh and gives her an alien pendant that allows its wearer to read other people's minds.

When the word "Torchwood" is daubed in blood at several murder scenes, the investigation leads to the use of the Resurrection Glove, and back to a familiar face.

The invisible spirit of a hit-and-run victim tries to convince Gwen to locate the 'alien' who might have been responsible for his death.

When a passenger plane from 1953 arrives in Cardiff in 2007 due to the Rift, the Torchwood team try to help three temporal immigrants adapt a new life in the city.