2/5 Barton and his team head deep behind German lines to track down a terrifying new weapon.
BBC Radio 4 Extra
2/10 Heading for a home they've never known, the crew must come to terms with shock news.
3/5 Barton and the team have found the Germans' secret weapon. But what exactly is it?
3/10 After their devastating news, the starship's crew face peril from a once-benign force.
Thursday 7 February 2013