TheArchaeons were an advanced and ancient race of globular beings. They could mimic other species by replicating their form on their globular surface, allowing them to communicate. They fancied themselves the propagators of life, who brought "order to primal worlds" by seeding planets with life in the early stages of their development. Their propagation mission toEarth was led by theFirst Propagator.

When theFirst Doctor,Susan andQuadriggerStoyn encountered them around450 million BC, they were situated onthe Moon and were seeding the Earth with life, using a large cannon that shotredlightning. When the Archaeons tried to disassemble the TARDIS, they took thetemporal stasis capacitor out, unintentionally creating astasis field which froze them all intime untilhuman explorers from theGiant Leap Base freed them millions of years later.

Blaming the Doctor for ruining their experiment, they planned toeradicate the disorderly humans on the Earth and Moon. However, the humans retaliated withmissiles, destroying the Archaeons. (AUDIO:The Beginning^[+]Loading...["The Beginning (audio story)"])