Twyst
From Tardis Wiki, the free Doctor Who reference
Twyst was interested in how the Eighth Doctor and C'rizz escaped from the prison. He was Eric Rawden technical person. and also physically tortured people. He tortured C'rizz to within an inch of his life. He later threatened Charley Pollard so that the Doctor would give them the Brain-worm. The brain worm killed him. (AUDIO: Something Inside)