The second series of Torchwood ran between 16 January and 4 April 2008. The first episode saw James Marsters appear as John Hart. It included glimpses of the 51st century and the First World War. Freema Agyeman guest starred as Martha Jones from episode 6 to episode 8.
The opening monologue spoken by John Barrowman was revised for this season; instead of saying how "you" have to be ready because in the 21st century "everything changes", it was now a more proactive statement, saying, "Torchwood is ready."
This season starred John Barrowman as Jack Harkness, Eve Myles as Gwen Cooper, Burn Gorman as Owen Harper, Naoko Mori as Toshiko Sato and Gareth David-Lloyd as Ianto Jones, with Freema Agyeman as Martha Jones in three episodes midway through the season.
Television stories
| Episode Number | Title | Writer(s) | Director | Notes |
| 1 | Kiss Kiss, Bang Bang | Chris Chibnall | Ashley Way | Reintroduction of Jack Harkness and introduction of Captain John Hart. |
| 2 | Sleeper | James Moran | Colin Teague | |
| 3 | To the Last Man | Helen Raynor | Andy Goddard | |
| 4 | Meat | Catherine Tregenna | Colin Teague | Rhys learns about Torchwood. |
| 5 | Adam | Catherine Tregenna | Andy Goddard | First appearance of Gray. |
| 6 | Reset | J.C. Wilsher | Ashley Way | Introduction of Martha Jones and first death of Owen Harper. |
| 7 | Dead Man Walking | Matt Jones | Andy Goddard | Resurrection of Owen Harper. |
| 8 | A Day in the Death | Joseph Lidster | Andy Goddard | Final appearance of Martha Jones. |
| 9 | Something Borrowed | Phil Ford | Ashley Way | Marriage of Gwen Cooper & Rhys Williams. |
| 10 | From Out of the Rain | Peter J. Hammond | Jonathan Fox Bassett | |
| 11 | Adrift | Chris Chibnall | Mark Everest | |
| 12: PT 1 | Fragments | Chris Chibnall | Jonathan Fox Bassett | Reintroduction of John Hart and Gray. Backstory revealed for all Torchwood Three members prior to Gwen's arrival. |
| 13: PT 2 | Exit Wounds | Chris Chibnall | Ashley Way | Death of Toshiko Sato and final death of Owen Harper. Final appearance of John Hart and Gray. Cardiff suffers heavy destruction enacted by Gray. Jack Harkness suffers a number of deaths too great to calculate. Gray is placed in hibernation. |
Cast
Recurring
- Captain Jack Harkness - John Barrowman
- Gwen Cooper - Eve Myles
- Owen Harper - Burn Gorman
- Toshiko Sato - Naoko Mori
- Ianto Jones - Gareth David-Lloyd
- Rhys Williams - Kai Owen
- Martha Jones - Freema Agyeman
- Captain John Hart - James Marsters
- Andy Davidson - Tom Price
- Young Girl - Skye Bennett
- Mary Cooper — Sharon Morgan
- Geraint Cooper — William Thomas
- Gray - Lachlan Nieboer
Guest
- Beth Halloran - Nikki Amuka-Bird
- Tommy Brockless — Anthony Lewis
- Adam Smith — Bryan Dick
- Young Jack — Jack Montgomery
- Aaron Copley - Alan Dale
- Henry Parker - Richard Briers
- Maggie Hopley - Christine Bottomley
- Brenda Williams — Nerys Hughes
- Barry Williams — Robin Griffith
- Ghostmaker - Julian Bleach
- Pearl - Camilla Power
- Jonathan Penn - Craig Gallivan
- Nikki Bevan — Ruth Jones
- Jonah Bevan — Robert Pugh
Novels
Aliens and enemies
- John Hart
- Blowfish
- Cell 114
- Keryehla Janees
- David
- Janet
- Harries & Harries
- Cash Cow
- Dave
- Myfanwy
- Adam Smith
- The Pharm
- Aaron Copley
- Mayflies
- Billy Davis
- Weevils
- Durac
- Little Girl
- The Pulse
- Nostrovites
- Night Travellers
- Ghostmaker
- Pearl
- Clown Acrobats
- Stromboli
- Tattooed Man
- Fire Jugglers
- Jonah Bevan
- Alex Hopkins
- Milton
- Tumour alien
- Hoix
- Three cowled men