Alien species

Autons: Autons, animated plastic shop mannequins
Cybermen: Cybermen - the result of body part replacement
Daleks: The Daleks, the most evil race in the Universe
Haemavores: Future evolution of humans from a poisened Earth
Mentors: Slug like creatures from a fluorescent planet
Sontarans: Sontarans, a squat species with a head like a potato, from the planet Sontar
Terileptils: A group of escaped prisioners planning to colonise Earth
The Nestene Consciousness: Nestene Consciousness, the controlling force behind the Autons
Varosians: Varosians, descendants of a human prison colony