Mr Sweet
From Tardis Wiki, the free Doctor Who reference
Mister Sweet was a red leech from the late Cretaceous Period. He was discovered in the year 1893 by Winifred Gillyflower, and given the name Mister Sweet. He was immediately recognised by Madame Vastra as being from the late Cretaceous Period, and a known menace to the Silurians. (TV: The Crimson Horror).
