Slipstream is a radio drama by Simon Bovey, consisting of five half hour episodes that were originally broadcast on BBC 7 during March 2008.
The British airforce finds themselves helpless against a mysterious new Nazi aircraft that is capable of fantastic speeds, and shoots down 150 Allied bombers during one of their bombing missions.
Jürgen is a former test pilot who was captured when his Messerschmitt Me 262 was shot down, and Barton promises to save his father in Potsdam from the advancing Russians, though he later admits he has no plans to do so.
In Germany the raiders enter an underground factory, the Mittelwerk where they find slave workers, a German "technician", Frau Schenk, and the mysterious Slipstream in a cave.
The artifact is intelligent and Jürgen learns to communicate with it, and discovers that it geared to teach science rather than destroy life, and that previous pilots died when they forced it to act against its programming by taking part in war.