|Also known as:||Kyberhund|
|Planet of Origin:||Welton|
|First Appearance:||The Retirement Home of the Circuit-Chaps|
Circuit-Mutts come in a wide assortment of models and are assembled from a mixture of components. They all have a metallic chassis and overall canine appearance. Some models have lacked eyes or mouths, and some have had no nose. At least one model had a visible rubber tongue.The Inspector first encountered these deadly robots on the planet Welton where they were guarding the abandoned factories of their dormant masters, the Circuit-Chaps, in "The Retirement Home of the Circuit-Chaps". The Eleventh Inspector came up against retro-model Circuit-Mutts when he returned to England to baby-sit a friend's child in "Grand Opening".