ABC airs the fourth episode of Frank Spotnitz’ sci-fi/horror series Night Stalker, a re-imagining of the 1970s series Kolchak: The Night Stalker, starring Stuart Townsend (The League of Extraordinary Gentlemen). William Lucking guest stars. 
ABC airs the fourth episode of Frank Spotnitz’ sci-fi/horror series Night Stalker, a re-imagining of the 1970s series Kolchak: The Night Stalker, starring Stuart Townsend (The League of Extraordinary Gentlemen). William Lucking guest stars.
As part of its repeat of the entire series (which has now attained cult status), Sci-Fi Channel airs the 14th and final episode of Joss Whedon’s science fiction series Firefly, starring Nathan Fillion. (This is an episode left unaired from the series’ original run on Fox, not a newly produced episode.) Richard Burgi (The Sentinel) guest stars.
ABC premieres the sixth episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan.
ABC airs the fifth episode of Frank Spotnitz’ sci-fi/horror series Night Stalker, a re-imagining of the 1970s series Kolchak: The Night Stalker, starring Stuart Townsend (The League of Extraordinary Gentlemen). Tony Todd guest stars.
ABC airs the 30th episode of the J.J. Abrams-produced series Lost. Malcolm David Kelley guest stars as Walt.
ABC premieres the seventh episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan.
ABC airs the sixth episode of Frank Spotnitz’ sci-fi/horror series Night Stalker, a re-imagining of the 1970s series Kolchak: The Night Stalker, starring Stuart Townsend (The League of Extraordinary Gentlemen). ABC cancels the series after this episode, leaving four episodes unaired (which will later appear on Sci-Fi Channel and on the DVD release); this also means that the series ends with part one of what was intended to be a two-part story.
ABC airs the 31st episode of the J.J. Abrams-produced series Lost. Brett Cullen guest stars.
ABC premieres the eighth episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan. Elizabeth Moss (The Handmaid’s Tale) guest stars.
David Tennant and Billie Piper star in a “special scene” written and filmed for the BBC’s Children In Need telethon. Not a spoof sketch, the short “mini-episode” bridges the gap between The Parting Of The Ways and the upcoming Christmas special, The Christmas Invasion. Though it can be considered an official part of the storyline, this is not considered a standalone episode of Doctor Who.
ABC airs the 32nd episode of the J.J. Abrams-produced series Lost. Francois Chau guest stars.
ABC premieres the ninth episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan.
ABC airs the 33rd episode of the J.J. Abrams-produced series Lost. Frederic Lane guest stars.
ABC premieres the tenth episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan.
The 712th episode of Doctor Who (the 14th since the series’ revival) airs on BBC1. David Tennant spends much of his first episode portraying an unconscious tenth Doctor, recovering from his regeneration; Penelope Wilton guest stars as Harriet Jones. This is the first episode of Doctor Who intended to be a Christmas special since 1965.
The 184th episode of Stargate SG-1 airs on the Sci-Fi Channel, starring Ben Browder, Amanda Tapping, Christopher Judge, Beau Bridges, and Michael Shanks. Claudia Black (Farscape) and Tony Todd guest star.
Sci-Fi Channel airs the 31st episode of Stargate Atlantis. Mitch Pileggi (The X-Files) guest stars.
Sci-Fi channel airs the 24th episode of Ronald D. Moore’s re-imagining of Battlestar Galactica. Michelle Forbes guest stars.
ABC airs the 34th episode of the J.J. Abrams-produced series Lost.
ABC premieres the 11th episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan.
The first episode of the science fiction sitcom Hyperdrive premieres on BBC2, starring Nick Frost, Miranda Hart and Kevin Eldon. 
The 185th episode of Stargate SG-1 airs on the Sci-Fi Channel, starring Ben Browder, Amanda Tapping, Christopher Judge, Beau Bridges, and Michael Shanks.
Sci-Fi Channel airs the 32nd episode of Stargate Atlantis.
Sci-Fi channel airs the 25th episode of Ronald D. Moore’s re-imagining of Battlestar Galactica. Michelle Forbes guest stars.
ABC airs the 35th episode of the J.J. Abrams-produced series Lost. M.C. Gainey guest stars.
ABC premieres the 12th episode of Shaun Cassidy’s sci-fi/horror series Invasion, starring William Fichtner (Contact), Eddie Cibrian, and Lisa Sheridan. Elizabeth Moss (The Handmaid’s Tale) guest stars.
The second episode of the science fiction sitcom Hyperdrive premieres on BBC2, starring Nick Frost, Miranda Hart and Kevin Eldon. Geoffrey McGivern (The Hitchhiker’s Guide To The Galaxy) and Montserrat Lombard (Ashes To Ashes) guest star.
ITV premieres the first episode of Steven Gallagher’s short-lived science fiction drama Eleventh Hour, starring Patrick Stewart (Star Trek: The Next Generation).
The 186th episode of Stargate SG-1 airs on the Sci-Fi Channel, starring Ben Browder, Amanda Tapping, Christopher Judge, Beau Bridges, and Michael Shanks.
Sci-Fi Channel airs the 33rd episode of Stargate Atlantis. Beau Bridges and Mitch Pileggi (The X-Files) guest star.