Dalek Sec

Dalek Sec is a visionary. He dreams of a new Dalek race, existing outside the shell. So he transforms himself into a Hybrid, able to walk without his Dalek Casing but also vulnerable to attack. His other Daleks dont like this too much, and they end up betraying him. He does lead them to victory against the Cybermen, however, with his awesome verbal whipping of their leader, as shown in the clip below.

He leads the Cult of Skaro.

Youtube Clip
http://www.youtube.com/watch?NR=1&v=kBSOhODoch0&feature=endscreen