As the hunt for a killer of two women intensifies, Nikki and Jack uncover a dangerous plot that threatens national security, whilst Leo fights to prove an imprisoned mother's innocence.
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Fri 18 Jan 2013 21:00
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Stunt performer Belinda McGinley talks through her 70ft leap.
Emilia discusses her ambitions and playing Nikki Alexander.
Richard Lintern talks about his character Thomas Chamberlain.
David Caves describes his instinctive character Jack Hodgson.
Liz describes her super-efficient character Clarissa Mullery.