The new series of Doctor Who spinoff Torchwood will follow one action-packed adventure throughout its run, the BBC has revealed.
Torchwood: Children of Earth will see Captain Jack Harkness (John Barrowman) and team battling to save the future of mankind against the fiercest force they have ever encountered.
Filming on the five-part series - Torchwood's third - has just begun in Cardiff and the production team have "plenty of surprises in store", said creator Russell T Davies.
"The new series of Torchwood is hugely bold and promises to be bigger and better than ever – the audience is in for an amazing ride," he said."
"This series is one big serial and the most ambitious story we've ever made."
I'd Do Anything judge Barrowman returns as Captain Jack while Eve Myles and Gareth David-Jones are back as Gwen Cooper and Ianto Jones.
And joining the regular cast are The Thick of It actor Peter Capaldi as a civil servant hiding a terrible secret and Bad Girls actress Liz May Brice as Johnson, a sceptical covert government agent with a score to settle against Torchwood.
Julie Gardner, head of drama for BBC Wales, said: "We hope to make Torchwood a gripping and surprising TV event with storylines that push our team into greater danger and sacrifice." (source: inthenews).