One of the many spinoffs of Protect and Survive. This one is written by JN1 and is conceived as a story series that focuses on a single Avro Vulcan bomber crew of the RAF, their deadly mission during The Exchange and subsequent return home. The title of the story refers to the serial number of the Avro Vulcan bomber appearing in it. The story is now finished and you can read it here. Alternatively, use the chapter guide below if you only want to read the chapters and not the discussion.
Intermission: Hello XM 594, From A Fellow Bomb Crew... (a crossover with Chipperback's The Land of Flatwater P & S spinoff)