Glohbb

The Glohbb was a creature from another dimension that was able to instil its mind into any big, gooey form. A failed invasion involved the distribution of free bubble gum dispensers on street corners. Once discarded, it developed a collective consciousness and the smaller pieces made their way to join with other pieces in much the same way as cells behaved. Its size continued to grow until the link between dimensions was finally broken by the Eleventh Doctor, who used and oxygen cyclinder in order to blow the gum apart. (COMIC: Gumfight)