Big Guy

"Big Guy" was a particularly large and dangerous Weevil found in Cardiff. It attacked and killed several people, then escaped into the sewers before Torchwood was able to catch it. Torchwood followed it for 2 months without any success. Eventually, Big Guy encountered Sally Blackteeth, who disemboweled it. Torchwood later found Big Guy's corpse. (TWN: Something in the Water)