On New Year's, 2215, the Mara, having travelled back in time, tried to upset the Web of Time by overthrowing Manussa earlier that it was meant to, before being trapped in a circle of cameras and monitors by the Fifth Doctor. (AUDIO: The Cradle of the Snake) Later, in 2326, the Mara manifested through its original creation via the Great Crystal, and the Manussan Empire was replaced by the Sumaran Empire. (AUDIO: The Cradle of the Snake)
Three hundred years later, in 2626, the Federator banished the Mara to the Dark Places of the Inside. (TV: Snakedance) possessing Tegan Jovanka on Deva Loka, (TV: Kinda) the Mara used her to pilot the Doctor's TARDIS to Manussa in its year 3126, where it planned its Becoming on the 500th anniversary of its defeat. (TV: Snakedance)
- These dates are based on the Great Crystal being 800 years old. In addition, Ambril states the middle Sumaran Era was 700 years ago.