The Great Intelligence

The Great Intelligence is a deadly parasite – a malevolent force lacking corporeal form that uses human beings as its servants, sometimes willingly, but often against its victim’s wishes.

Before racing away to find Clara, the Doctor stared at Doctor Simeon’s business card and the name printed on it stirred a memory. ‘The Great Intelligence…’ he murmured. ‘Rings a bell…’ The recollection is because the Time Lord has confronted the Intelligence on two previous occasions…