Quark (Doctor Who)

Quark is the name given to the semi-humanoid robotic servants of the Dominators, a humanoid race of conquerors which have control over the greater part of ten galaxies.

Appearance
The Quarks are short semi-humanoid robotic beings, with robust bodies, retractable arms and a spherical head sporting five spikes (four horizontal, symmetrically arranged around the head, and a fifth one vertical protruding from the top of it).

Powers and Abilities
Their arms are equipped with weapons which fire beans of energy to stun or to kill. The Quarks are also capable of speech, although they seem to use it quite rarely.