The abnormal insurgency was an uprising of abnormals against the human authorities of the world, started when hundreds of abnormal refugees from Hollow Earth arrived on the surface in 2011.
History[]
Season 4[]
| Episode 4x13 - "Sanctuary for None, Part II": It was led by Caleb, a powerful humanoid abnormal with enormous physical strength, until he was killed by Helen Magnus while trying to invade the Old City Sanctuary. |