The "before time" was how child residents of Earth Two referred to the period of time in which a substantial population of "grups" still existed. It was somewhere in this time period that the grups began to become ill. (TOS: "Miri")

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.