BBC3 premieres the first episode of Russell T. Davies’ science fiction series Torchwood. Starring John Barrowman as Captain Jack Harkness (a character originating in the first season of the revived Doctor Who), the series deals with a nexus point of strange phenomena, and a team assembled to deal with those unusual occurrences, in Cardiff, Wales. Kai Owen and Tom Price guest star. 
BBC3 airs the second episode of Russell T. Davies’ science fiction series Torchwood, starring John Barrowman and Eve Myles. Kai Owen and Tom Price guest star.
BBC3 airs the third episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Gareth Thomas (Blake’s 7) guest stars.
BBC3 premieres the fourth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. As implied in the title, this episode is the first appearance in Torchwood of an enemy from Doctor Who lore, picking up story threads from the recent second season finale of Doctor Who.
BBC3 airs the fifth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. This episode is written by Sapphire & Steel creator P.J. Hammond.
BBC3 airs the sixth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Kai Owen and Owen Steele guest star.
BBC3 airs the seventh episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Daniela Denby-Ashe guest stars.
BBC3 premieres the eighth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Yasmin Bannerman guest stars.
BBC3 airs the ninth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC3 airs the tenth episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC3 airs the 11th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. This episode is written by writer and actor Noel Clarke (Doctor Who, Star Trek Into Darkness), better known as TARDIS traveler Mickey Smith.
BBC3 premieres the 12th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC3 airss the 13th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. This episode brings the series’ first season to a close.
BBC2 airs the 14th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. This episode kicks off the second season, and picks up the first season’s plot thread of Jack having gone missing (via TARDIS). James Marsters (Buffy The Vampire Slayer) guest stars.
BBC2 airs the 15th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC2 airs the 16th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC2 airs the 17th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC2 airs the 18th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who.
BBC2 airs the 19th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Freema Agyeman reprises her Doctor Who role as Martha Jones, and Alan Dale (24, Star Trek: Nemesis, Lost, Once Upon A Time) guest stars.
BBC2 airs the 20th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Freema Agyeman reprises her Doctor Who role as Martha Jones.
BBC2 premieres the 21st episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Freema Agyeman reprises her Doctor Who role as Martha Jones. Richard Briers guest stars. The episode marks the TV writing debut of Joseph Lidster, whose first professionally published Doctor Who-related work had been a script for a Big Finish audio play submitted during a Big Finish “new talent” contest in 2002.
BBC2 airs the 22nd episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Nerys Hughes guest stars.
BBC2 airs the 23rd episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Julian Bleach guest stars.
BBC2 airs the 24th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. Tom Price guest stars.
BBC2 airs the 25th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. James Marsters guest stars.
BBC2 airs the 26th episode of Russell T. Davies’ science fiction series Torchwood, a more adult-themed spinoff of Doctor Who. James Marsters guest stars. This episode wraps up the show’s second season, and is the final appearance of two of Torchwood’s long-standing members, Toshiko Sato and Owen Harper.
BBC1 airs the 27th episode of Russell T. Davies’ science fiction series Torchwood. Unlike previous seasons, this season – subtitled Children Of Earth – is only five episodes long, broadcast at a rate of one installment per night, with the implication that the story is unfolding more or less in real time. Peter Capaldi and Paul Copley guest star. 
BBC1 airs the 28th episode of Russell T. Davies’ science fiction series Torchwood. Unlike previous seasons, this season – subtitled Children Of Earth – is only five episodes long, broadcast at a rate of one installment per night, with the implication that the story is unfolding more or less in real time. Peter Capaldi and Paul Copley guest star.
BBC1 airs the 29th episode of Russell T. Davies’ science fiction series Torchwood. Unlike previous seasons, this season – subtitled Children Of Earth – is only five episodes long, broadcast at a rate of one installment per night, with the implication that the story is unfolding more or less in real time. Peter Capaldi and Paul Copley guest star.
BBC1 airs the 30th episode of Russell T. Davies’ science fiction series Torchwood. Unlike previous seasons, this season – subtitled Children Of Earth – is only five episodes long, broadcast at a rate of one installment per night, with the implication that the story is unfolding more or less in real time. Peter Capaldi and Paul Copley guest star.