Stuart Sutcliffe (Slow Decay)
From Tardis Wiki, the free Doctor Who reference
Stuart Sutcliffe, most often simply called Stuart and named after the Beatles member of the same name, was the name which Jack Harkness gave to an alien tapeworm embryo. It was found by Owen Harper when he dissected a 'Start' pill from the Scotus Clinic.
Stuart was around a centimetre long, and curled up into a comma. It was charcoal in colour, with irregular blue stripes and looked like three very small worms joined together at one end. Thousands of minute , translucent fibres surrounded the free ends. (PROSE: Slow Decay)