Chumbley

The Chumblies (a name invented by the Doctor's companion Vicki) are a kind of highly advanced robots created by the Rills.
== Biology ==
They are small, conical-shaped and used for a variety of purposes, including recognition, defense and communication with non-Rills (as their masters can only communicate telepathically among themselves). The Chumblies are blind, but able to find their way around using sound waves and heat vision. Their arsenal, although employed only for self-defense, is quite deadly, including projectile weapons, flame throwers and ammonia bombs.