Sec

Sec was the leader of The Cult of Skaro and the Dalek responsible for the invasion of Earth in 2006. Encased in a fearsome Black design, Sec nearly succedded in conquering Earth and destroying the Cybermen. Despite the Tenth Doctor's meddleing and the eventual destruction of the Dalek army Sec escaped via a Time Shift.

The fate of the other members of the Cult of Skaro is unknown.