.
| Ep. # | Title | Writer | Original airdate
|
| 01 | "Everything Changes" | Russell T. Davies | 22 October, 2006 |
| Police Constable Gwen Cooper comes across the mysterious organization known as Torchwood; investigating their world, she finds technology and methods that she never could have imagined. |
| 02 | "Day One" | Chris Chibnall | 22 October, 2006 |
| Gwen joins the team; Cardiff's night-life is at the mercy of a sexually driven alien which has possessed a young woman; Torchwood must discover its host and deal with the ideas that it represents. |
| 03 | "Ghost Machine" | Helen Raynor | 29 October, 2006 |
| Torchwood comes into possession of a device that can tap into the hidden energy left behind by strong emotions. When Owen accidentally uses the device at the scene of an unsolved murder, he becomes obsessed with bringing the killer to justice. |
| 04 | "Cyberwoman" | Chris Chibnall | 5 November, 2006 |
| Ianto has a dark secret hidden in the basement of the Hub — a secret he will protect at any cost. |
| 05 | "Small Worlds" | Peter J. Hammond | 12 November, 2006 |
| An intelligent but withdrawn child has her suppressed anger taken advantage of; Jack must encounter his past to defeat those responsible: fairies at the bottom of her garden. |
| 06 | "Countrycide" | Chris Chibnall | 19 November, 2006 |
| The separated Torchwood team is at the mercy of hunters, playing a game of cat and mouse in an old village in the Brecon Beacons. |
| 07 | "Greeks Bearing Gifts" | Toby Whithouse | 26 November, 2006 |
| Faced with sudden telepathic abilities after meeting a woman called Mary, Toshiko finds it a mixed blessing when the dark secrets of others are revealed to her. |
| 08 | "They Keep Killing Suzie" | Paul Tomalin & Dan McCulloch | 3 December, 2006 |
| Gwen uses alien technology to investigate a serial killer; but both the killer and the device hold dangers, and a mysterious link to Suzie Costello. |
| 09 | "Random Shoes" | Jacquetta May | 10 December, 2006 |
| A hit-and-run victim, obsessed with aliens in life, realises that there is only one person who can solve the mystery of his death: Gwen Cooper. |
| 10 | "Out of Time" | Cath Tregenna | 17 December, 2006 |
| A plane from the 1950s lands in modern Cardiff, courtesy of the Rift; the passengers are reoriented by the Torchwood team, who become drawn closely to their lives. |
| 11 | "Combat" | Noel Clarke | 24 December, 2006 |
| Weevils are being abducted by humans. As Owen goes undercover to find out who is committing these crimes, he meets Mark Lynch. Battling his own demons, he finds himself being drawn into the subculture he is investigating. |
| 12 | "Captain Jack Harkness" | Cath Tregenna | 1 January, 2007 |
| Jack and Toshiko are transported back to the Blitz as Jack faces an unexpected secret from his past as they meet a handsome young American squad leader named… Captain Jack Harkness. |
| 13 | "End of Days" | Chris Chibnall | 1 January, 2007 |
| The Rift fractures violently, setting the stage for an epic battle with Torchwood in the middle as they see echoes of the past and visions of the future. |
