The BBC has released an extended trailer for Torchwood Season 2. You can watch the trailer on YouTube here.

The clip shows James Marsters, best known as Spike in Buffy the Vampire Slayer, along with Freema Agyeman, who played Martha in Doctor Who's third season. Playing the same Martha character, Freema Agyman will become a regular cast member, while James Marsters will make a number of guest appearances as an alien life form.

Veteran actor Richard Briers, best know for his work in the BBC's The Good Life, also guest stars as a reclusive millionaire, the keeper of alien secrets.

Torchwood was created by Russell T. Davies, the man responsible for Doctor Who's recent revival. Davies has said there will be some large-scale changes in Season 2.

The Season 2 trailer looks great. Mixing detective work, science fiction, horror, with the occasional flashes of sex and dark humour, Torchwood is a welcome antidote to the more cliché ridden science fiction television studios have been producing lately.

According to BBC America, Torchwood Season 2 will be broadcast in the US from 26 January on the Sci-Fi Channel and in the UK on BBC2 from 16 January.

You can find the BBC's official Torchwood Season 2 website here (viewing is restricted to those in the UK). BBC America's unrestricted Torchwood website is here.