Great Intelligence is a fictional character portrayed by Ian McKellen in the TV series Doctor Who.
In the first episode they appeared in, titled The Snowmen (season 7), they were 73 years old.
They appear in 1 episodes out of a total of 166 aired
Episodes1
The Snowmen
episode S7.E6 december 2012London, 1892. Snow is evolving, turning into icy monstrosities, but this is no concern for the Doctor who has given up trying to save the universe, leaving it to a clever young governess named Clara to save the day.