A child from Castrovalva once had a brief conversation with the newly-regenerated Fifth Doctor about basic mathematics.
Like all the other residents of the city, she wasn't real, but rather a block transfer computation creation of the Master. (TV: Castrovalva)
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.