Russell T Davies has revealed the title of series three's arc story exclusively to Torchwood magazine. Torchwood: Children Of Earth is the tantalising name of the five-part story, set for broadcast over one week on BBC1 in spring 2009.

Russell outlined his vision for the new series at a top secret 'tone meeting' last month, where writers, producers and key crew get together to thrash out the details of the script before production begins. "I usually give you all one or two tone words when we have a meeting like this," the executive producer told the assembled team, "but if I were to give you two words this time, they would be 'Euros Lyn'. More than ever before, this series of Torchwood will be director-led, and it will look absolutely amazing."

Euros Lyn is known to Doctor Who fans for directing such varied stories as The End Of The World and The Girl In The Fireplace. Most recently, he oversaw the Steven Moffat two-parter Silence In The Library/Forest Of The Dead. Children Of Earth will be his first foray into the world of Torchwood, but promises to be every bit as ambitious in its scope.

Principal photography on series three began on August 18, and is set to continue until November – in Cardiff and beyond.

Click here to read about the official Torchwood magazine.