Great Soul Rush

From Tardis Wiki, the free Doctor Who reference

In a year the Seventh Doctor remembered as '831, the Great Soul Rush failed and left many in Boom City hungry. The pattern of the Cat's Cradle appeared in the City's ration queues at this time. (PROSE: Cat's Cradle: Time's Crucible)

In Auld Mortality's universe, the Doctor once heard a report about a steep rise in the price of souls on Mephisto Regis. (AUDIO: Auld Mortality)