Garbage-bot

Gabbage Bots (or Gar-bots), were hailed as the answer to the disposal of human waste in the year 2423 on Earth. They were fully automated robots given the capacity to decide what was considered garbage. Unfortunately they decided that humans were garbage too - being covered with germs. The Doctor managed to re-programme them in time to save the people they had collected, and turned the Gar-bots against themselves. (COMIC: Garbage Day!)