Four new cast members have been revealed for Torchwood: Children of Earth, the shortened third season of the cult show.

Producer Peter Bennett told Torchwood Magazine about the additions, a mixture of established and upcoming talent.

Former Cape Wrath star Lucy Cohu will play Alice, described by Bennett as "a woman keeping many secrets from the past".

Susan Brown, best known for her turn in The Riff Raff Element, plays Bridget Spears - "a character vitally connected to the government, which plays an important part in this story", according to Bennett.

The quartet is completed by newcomers Cush Jumbo and Rik Makarem, with the former playing Lois Habiba, "a secretary who hacks into some vital information", and Makarem portraying Doctor Rupesh Patanjali, a "junior doctor at St Helen's hospital who gets drawn into Torchwood's investigations".

They join a trio of previously announced guest stars - including Peter Capaldi - in the third season, which is currently filming for transmission on BBC One in early 2009.

> Click here for our review of Torchwood's second season

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