The Ghosts of Greenwich (audio story)

 was the third and final story in the audio anthology Heritage 1, produced by Big Finish Productions. It was written by Paul Morris and featured Neve McIntosh as Madame Vastra, Catrin Stewart as Jenny Flint and Dan Starkey as Strax.

Publisher's summary
Strange things are happening to the people of Greenwich. Phantoms of the living appear, while others are aged beyond their years. A cloaked figure stalks the streets, and time is out of joint.

Madame Vastra, Jenny and Strax find all clues point towards the Meridian Line. Beneath the Royal Observatory lies a secret – something terribly ancient and horribly dangerous…

Plot
to be added

Cast

 * Madame Vastra - Neve McIntosh
 * Jenny Flint - Catrin Stewart
 * Strax - Dan Starkey
 * Neville Plumstead / The Creature / Bobby Harris - Joseph Kloska
 * Charlotte Mayfly - Lucy Briggs-Owen
 * Sir Jasper Eagleton / Old Smallpiece / Jonathan Mayfly - Trevor Cooper
 * Penny Lambeth / Angie Sangster / Archivist - Daisy Ashford

Worldbuilding

 * The Paternoster Gang visit the Royal Observatory in Greenwich.
 * Vastra identifies negative chronons as "the very enemy of causality", as antimatter is to matter.
 * The negative chronons flow along the Greenwich meridian line, also referred to as the prime meridian. Plumstead claims that the placement of the prime meridian was no mere human construct, as the creature beneath the site of the Royal Observatory had influenced its placement.

Continuity

 * Jenny refers to Strax having once been a nurse. (TV: A Good Man Goes to War)
 * Plumstead says that the creature lives in gap between now and now which is similar to 's description of Interstitial time. (TV: The Time Monster)