The sci-fi drama, which is a spinoff to Doctor Who, will air a ten-part run following an international partnership between the corporation and US premium network Starz Entertainment.
Russell T Davies will continue to write the series. It has also been revealed that plots are to go beyond Cardiff to locations worldwide.
"We have a long history of working with many US networks but it is incredibly exciting to be working with Starz for the first time, as well as to be reunited with the best of British in Russell, Jane [Tranter] and Julie [Gardner]," said Ben Stephenson, controller of BBC drama commissioning. "Torchwood will burst back onto the screen with a shocking and moving story with global stakes and locations that will make it feel bigger and bolder than ever."
Jane Tranter of BBC Worldwide commented: "Torchwood has attracted remarkable attention and loyalty in both the UK and US, and in this new partnership with Starz, the next chapter will not only reward our current fans, but also introduce new viewers to the most impressive instalment yet."
Meanwhile, Starz president Chris Albrecht added: "We're committed to programming exceptional television that is entertaining, imaginative and provides a premium TV experience, and by any measure the new concept for Torchwood fits that mandate."
Torchwood stars John Barrowman as Captain Jack and Eve Myles as Gwen.